The following table provides summary statistics for contract job vacancies with a requirement for Unix skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Unix over the 3 months to 30 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Unix
UK
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 41 32 32
Rank change year-on-year -9 0  
Contract jobs citing Unix 2214 3039 2827
As % of all contract IT jobs advertised in the UK 4.86% 5.61% 5.26%
As % of the Operating Systems category 23.56% 26.17% 24.19%
Number of daily rates quoted 1437 1975 1632
Median daily rate £450 £425 £425
Median daily rate % change year-on-year +5.88% -  
90% offered a daily rate of more than £325 £305 £286
10% offered a daily rate of more than £600 £595 £575
UK excluding London median daily rate £425 £400 £375
% change year-on-year +6.25% +6.66%  
Number of hourly rates quoted 28 34 39
Median hourly rate £40.00 £22.75 £30.00
Median hourly rate % change year-on-year +75.82% -24.16%  
90% offered a hourly rate of more than £20.55 £17.50 £12.80
10% offered a hourly rate of more than £47.00 £51.00 £49.50
UK excluding London median hourly rate £32.50 £24.15 £35.00
% change year-on-year +34.57% -31.00%  

Unix is in the operating system skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies with a requirement for operating system skills.

Contract Operating System Skills
UK
Contract job vacancies with a requirement for operating system skills 9398 11612 11688
As % of all contract IT job vacancies advertised in the UK 20.64% 21.45% 21.77%
Number of daily rates quoted 5989 7236 6633
Median daily rate £405 £386 £375
Median daily rate % change year-on-year +5.05% +2.80%  
90% offered a daily rate of more than £175 £196 £165
10% offered a daily rate of more than £550 £530 £525
UK excluding London median daily rate £385 £365 £338
% change year-on-year +5.47% +8.14%  
Number of hourly rates quoted 581 684 978
Median hourly rate £16.18 £16.50 £16.00
Median hourly rate % change year-on-year -1.93% +3.12%  
90% offered a hourly rate of more than £11.00 £12.00 £11.00
10% offered a hourly rate of more than £44.00 £45.00 £37.50
UK excluding London median hourly rate £15.50 £16.50 £15.50
% change year-on-year -6.06% +6.45%  

Unix
Job Vacancy Trend

The job posting trend of jobs advertised citing Unix as a proportion of all contract or permanent IT jobs with a match in the Operating Systems category.

Job vacancy trend for Unix in the UK

Unix
Contractor Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Unix.

Contractor daily rate trend for Unix in the UK

Unix
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing Unix over the 3 months to 30 March 2017.

Contractor daily rate histogram for Unix in the UK

Unix
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Unix.

Contractor hourly rate trend for Unix in the UK

Unix
Contractor Hourly Rate Histogram

The hourly rate distribution of IT jobs citing Unix over the 3 months to 30 March 2017.

Contractor hourly rate histogram for Unix in the UK

Unix
Top 30 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Unix within the UK over the 3 months to 30 March 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England -7 2008 £450 - 415
London -4 1027 £500 +5.26% 199
South East -2 425 £450 +12.50% 85
City of London -1 184 £550 +15.78% 69
Surrey +1 131 £438 +2.94% 25
Yorkshire -7 123 £440 -2.16% 20
North West -8 108 £425 +6.25% 16
Scotland -9 101 £400 -1.23% 20
Hampshire -9 88 £450 +18.42% 17
East of England 0 70 £388 -3.12% 28
Berkshire +7 69 £438 +2.94% 17
West Midlands -38 69 £450 - 19
East Midlands -12 66 £368 -5.76% 13
Glasgow +14 65 £400 +6.66% 7
Northern Ireland +15 64 £429 +22.32% 6
South Yorkshire -2 62 £488 +5.40% 1
Manchester 0 60 £425 +13.33% 10
Sheffield -4 60 £488 - 1
North East -10 59 £433 +47.86% 5
County Antrim +14 55 £425 +21.25% 5
Tyne and Wear -15 55 £429 +47.84% 5
Belfast +14 53 £425 +21.25% 4
Buckinghamshire +3 53 £463 +23.33% 7
Newcastle upon Tyne -14 53 £429 +47.84% 5
West Yorkshire -20 53 £425 +0.59% 16
South West -41 49 £450 +20.00% 29
Essex +15 47 £424 +5.87% 3
West Sussex +18 43 £506 +22.60% 3
Leeds -19 43 £425 -5.55% 12
Milton Keynes +3 42 £450 +28.57% 2

For the 6 months to 30 March 2017, IT contractor jobs citing Unix also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads with a requirement for Unix.

1 2787 (61.56%) Linux
2 1506 (33.27%) SQL
3 1423 (31.43%) Java
4 1359 (30.02%) Oracle
5 1318 (29.11%) Windows
6 1175 (25.96%) Agile Software Development
7 1132 (25.01%) Finance
8 841 (18.58%) Python
9 715 (15.79%) Perl
10 682 (15.07%) Shell Script
11 672 (14.84%) DevOps
12 659 (14.56%) Banking
13 648 (14.31%) Git (software)
14 566 (12.50%) JavaScript
15 542 (11.97%) Security Cleared
16 541 (11.95%) Red Hat
17 520 (11.49%) Jenkins
18 500 (11.04%) Analytical Skills
19 488 (10.78%) XML
20 482 (10.65%) Configuration Management
21 479 (10.58%) Puppet
21 479 (10.58%) Relational Database
22 478 (10.56%) HTML
23 459 (10.14%) VMware
23 459 (10.14%) Red Hat Enterprise Linux
24 451 (9.96%) Solaris
25 416 (9.19%) Oracle Database
26 408 (9.01%) SC Cleared
26 408 (9.01%) AIX
27 393 (8.68%) IBM

Unix
Co-occurring IT Skills by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 285 (6.30%) WebLogic
2 246 (5.43%) Apache
3 237 (5.24%) WebSphere
4 189 (4.17%) Confluence
5 184 (4.06%) Tomcat
6 150 (3.31%) JBoss
7 108 (2.39%) Apache Spark
8 83 (1.83%) Oracle SOA Suite
9 76 (1.68%) IIS
10 62 (1.37%) nginx
11 52 (1.15%) MS Exchange
11 52 (1.15%) OpenStack
12 50 (1.10%) SAS
13 46 (1.02%) WebSphere Application Server
14 43 (0.95%) SharePoint
15 40 (0.88%) Elasticsearch
16 33 (0.73%) Apache Pig
17 32 (0.71%) Oracle Workflow
18 30 (0.66%) Apache Solr
19 25 (0.55%) Oracle Application Server
Applications
1 206 (4.55%) MS Excel
2 67 (1.48%) MS PowerPoint
3 65 (1.44%) MS Office
4 34 (0.75%) MS Visio
5 23 (0.51%) MS Project
6 16 (0.35%) Photoshop
7 5 (0.11%) HipChat
8 4 (0.088%) Gliffy
9 3 (0.066%) AutoCAD
9 3 (0.066%) Siemens NX
9 3 (0.066%) SPSS
10 2 (0.044%) Mingle
10 2 (0.044%) Spreadsheet
11 1 (0.022%) EngageOne
11 1 (0.022%) Windchill
Business Applications
1 53 (1.17%) Oracle EBS
2 39 (0.86%) Oracle Applications
3 31 (0.68%) Oracle EBS R12
4 29 (0.64%) Oracle 11i
5 28 (0.62%) Adobe Campaign
6 26 (0.57%) Unica
7 17 (0.38%) IBM Operational Decision Manager
7 17 (0.38%) SAP Oil and Gas
8 16 (0.35%) Oracle BPM
9 13 (0.29%) Dynamics CRM
10 9 (0.20%) Summit
11 8 (0.18%) Oracle Payables
11 8 (0.18%) Oracle Retail
11 8 (0.18%) Remedy ITSM
12 7 (0.15%) Demantra
12 7 (0.15%) ION MarketView
12 7 (0.15%) Magento
12 7 (0.15%) Oracle Receivables
12 7 (0.15%) SnowdropKCS
13 6 (0.13%) Remedy AR System
Cloud Services
1 325 (7.18%) Amazon AWS
2 138 (3.05%) Microsoft Azure
3 108 (2.39%) PaaS
4 98 (2.16%) IaaS
5 83 (1.83%) GitHub
6 77 (1.70%) SaaS
7 75 (1.66%) Cloud Computing
8 30 (0.66%) Amazon S3
9 28 (0.62%) Amazon EC2
10 27 (0.60%) AWS CloudFormation
11 25 (0.55%) OpenShift
12 24 (0.53%) Virtual Private Cloud
13 22 (0.49%) Trello
14 18 (0.40%) AWS Elastic Beanstalk
14 18 (0.40%) Office 365
15 16 (0.35%) Google Cloud Platform
16 14 (0.31%) Amazon ELB
17 12 (0.27%) Adobe Analytics
17 12 (0.27%) Amazon Kinesis
17 12 (0.27%) Azure Active Directory
Communications & Networking
1 348 (7.69%) TCP/IP
2 316 (6.98%) Firewall
3 272 (6.01%) HTTP
4 255 (5.63%) SAN
5 215 (4.75%) DNS
6 196 (4.33%) LDAP
7 154 (3.40%) SSL
8 135 (2.98%) Internet
9 129 (2.85%) LAN
10 127 (2.81%) WAN
11 105 (2.32%) Network Security
12 96 (2.12%) NAS
12 96 (2.12%) VPN
13 86 (1.90%) SSH
14 85 (1.88%) FTP
15 79 (1.75%) DHCP
16 72 (1.59%) VoIP
17 58 (1.28%) Intrusion Detection
18 57 (1.26%) Kerberos
19 38 (0.84%) MPLS
Database & Business Intelligence
1 479 (10.58%) Relational Database
2 416 (9.19%) Oracle Database
3 331 (7.31%) SQL Server
4 230 (5.08%) Big Data
5 221 (4.88%) Hadoop
6 196 (4.33%) MongoDB
7 183 (4.04%) MySQL
8 162 (3.58%) DB2
9 146 (3.23%) Oracle Database 11g
10 131 (2.89%) RDBMS
11 130 (2.87%) PostgreSQL
12 128 (2.83%) NoSQL
13 107 (2.36%) Data Warehouse
14 105 (2.32%) Oracle Database 10g
15 104 (2.30%) Apache Hive
16 101 (2.23%) BusinessObjects
17 85 (1.88%) Oracle Database 12c
18 77 (1.70%) KDB
19 72 (1.59%) Oracle Reports
20 69 (1.52%) Apache Cassandra
Development Applications
1 648 (14.31%) Git (software)
2 520 (11.49%) Jenkins
3 360 (7.95%) JIRA
4 246 (5.43%) Subversion
5 238 (5.26%) Maven
6 202 (4.46%) JUnit
7 180 (3.98%) Selenium
8 162 (3.58%) Cucumber
9 109 (2.41%) Sonatype Nexus
10 100 (2.21%) Gradle
11 93 (2.05%) Ant
12 90 (1.99%) Mockito
13 75 (1.66%) TeamCity
14 54 (1.19%) Eclipse
15 51 (1.13%) Hudson
16 44 (0.97%) Atlassian Bamboo
17 43 (0.95%) HP UFT
17 43 (0.95%) Vagrant
18 42 (0.93%) WebDriver
19 41 (0.91%) Bitbucket
General
1 1132 (25.01%) Finance
2 659 (14.56%) Banking
3 210 (4.64%) Investment Banking
4 209 (4.62%) Front Office
5 136 (3.00%) Retail
6 104 (2.30%) Telecoms
7 66 (1.46%) Manufacturing
8 60 (1.33%) Marketing
9 59 (1.30%) Financial Institution
10 48 (1.06%) Legal
11 44 (0.97%) Law
12 32 (0.71%) Back Office
13 28 (0.62%) Games
14 25 (0.55%) Publishing
15 22 (0.49%) Electronics
16 21 (0.46%) Billing
17 16 (0.35%) Advertising
18 14 (0.31%) Automotive
19 11 (0.24%) Retail Banking
20 10 (0.22%) Pharmaceutical
Job Titles
1 1380 (30.48%) Developer
2 540 (11.93%) Java Developer
3 495 (10.93%) Analyst
4 354 (7.82%) Administrator
5 331 (7.31%) DevOps Engineer
6 271 (5.99%) Architect
7 236 (5.21%) Consultant
8 217 (4.79%) Unix Engineer
9 201 (4.44%) C++ Developer
10 196 (4.33%) Linux Engineer
11 195 (4.31%) Senior Developer
12 167 (3.69%) Unix Administrator
13 163 (3.60%) Systems Administrator
14 161 (3.56%) DBA
15 130 (2.87%) Support Analyst
16 127 (2.81%) Unix Systems Administrator
17 117 (2.58%) Senior Java Developer
18 112 (2.47%) Oracle Developer
19 107 (2.36%) Oracle DBA
20 102 (2.25%) Test Analyst
Libraries, Frameworks & Software Standards
1 488 (10.78%) XML
2 478 (10.56%) HTML
3 358 (7.91%) Web Services
4 340 (7.51%) Spring
5 314 (6.94%) CSS
6 286 (6.32%) REST
7 280 (6.19%) JSON
8 271 (5.99%) SOAP
9 252 (5.57%) Middleware
10 224 (4.95%) J2EE
11 202 (4.46%) Hibernate
12 152 (3.36%) JMS
13 148 (3.27%) HTML5
14 127 (2.81%) Node.js
15 123 (2.72%) RESTful
16 121 (2.67%) .NET
17 116 (2.56%) jQuery
18 106 (2.34%) AngularJS
19 103 (2.28%) STL
20 91 (2.01%) XSLT
Miscellaneous
1 500 (11.04%) Analytical Skills
2 276 (6.10%) Data Centre
3 192 (4.24%) Foreign Exchange (FX)
4 159 (3.51%) Management Information System
5 134 (2.96%) Derivative
6 120 (2.65%) Linux Command Line
7 111 (2.45%) Clustering
7 111 (2.45%) Equities
8 108 (2.39%) Algorithms
8 108 (2.39%) Computer Science
9 98 (2.16%) User Experience
10 97 (2.14%) Mainframe
11 89 (1.97%) Fixed Income
12 67 (1.48%) Replication
13 66 (1.46%) Tandem
14 56 (1.24%) Client/Server
15 51 (1.13%) Enterprise Storage
16 50 (1.10%) iSeries
17 48 (1.06%) PKI
18 44 (0.97%) Enterprise Software
Operating Systems
1 2787 (61.56%) Linux
2 1318 (29.11%) Windows
3 459 (10.14%) Red Hat Enterprise Linux
4 451 (9.96%) Solaris
5 408 (9.01%) AIX
6 283 (6.25%) Windows Server
7 191 (4.22%) Mac OS X
8 112 (2.47%) Windows Server 2008
9 89 (1.97%) CentOS
10 85 (1.88%) Windows Server 2012
11 70 (1.55%) SUSE
12 64 (1.41%) HPUX
13 61 (1.35%) Windows XP
14 58 (1.28%) Windows Server 2003
15 51 (1.13%) Ubuntu
16 49 (1.08%) Windows 2000
16 49 (1.08%) zOS
17 41 (0.91%) Mac OS
17 41 (0.91%) Oracle Linux
18 40 (0.88%) SUSE Linux Enterprise Server
Processes & Methodologies
1 1175 (25.96%) Agile Software Development
2 672 (14.84%) DevOps
3 482 (10.65%) Configuration Management
4 366 (8.08%) Continuous Integration
5 353 (7.80%) Open Source
6 341 (7.53%) ITIL
7 331 (7.31%) Scrum
8 313 (6.91%) TDD
9 307 (6.78%) Migration
10 306 (6.76%) OO
11 278 (6.14%) SDLC
12 245 (5.41%) Software Engineering
13 228 (5.04%) Mentoring
14 224 (4.95%) Performance Tuning
15 212 (4.68%) Change Management
16 206 (4.55%) Web Development
17 199 (4.40%) High Availability
18 190 (4.20%) Low Latency
19 184 (4.06%) Multithreading
20 166 (3.67%) Analytics
Programming Languages
1 1506 (33.27%) SQL
2 1423 (31.43%) Java
3 841 (18.58%) Python
4 715 (15.79%) Perl
5 682 (15.07%) Shell Script
6 566 (12.50%) JavaScript
7 369 (8.15%) C++
8 339 (7.49%) PL/SQL
9 315 (6.96%) Bash Shell
10 260 (5.74%) Ruby
11 188 (4.15%) C
12 181 (4.00%) Scala
13 166 (3.67%) PowerShell
14 142 (3.14%) C#
15 136 (3.00%) Korn
16 133 (2.94%) PHP
17 61 (1.35%) Groovy
18 55 (1.21%) R
19 51 (1.13%) VB
20 41 (0.91%) Go
Qualifications
1 542 (11.97%) Security Cleared
2 408 (9.01%) SC Cleared
3 302 (6.67%) Degree
4 96 (2.12%) DV Cleared
5 83 (1.83%) CISSP
6 70 (1.55%) Cisco Certification
7 67 (1.48%) ISEB
8 61 (1.35%) BPSS Clearance
9 55 (1.21%) ISTQB
10 47 (1.04%) SANS
11 42 (0.93%) CCNA
12 41 (0.91%) ISTQB Foundation Certification
13 40 (0.88%) CCNP
14 38 (0.84%) CEH
15 33 (0.73%) SSCP
16 30 (0.66%) CREST Certified
17 29 (0.64%) OSCP
17 29 (0.64%) RHCE
18 23 (0.51%) Microsoft Certification
19 20 (0.44%) ITIL Certification
Quality Assurance & Compliance
1 149 (3.29%) QA
2 104 (2.30%) SLA
3 71 (1.57%) MiFID
4 47 (1.04%) Disclosure Scotland
5 36 (0.80%) Data Quality
6 34 (0.75%) PCI DSS
7 33 (0.73%) Dodd-Frank
8 32 (0.71%) EMIR
9 26 (0.57%) Sarbanes-Oxley
10 21 (0.46%) FATCA
10 21 (0.46%) ISO/IEC 27001
11 15 (0.33%) ISO 9001
12 12 (0.27%) JSP 440
12 12 (0.27%) PMO
12 12 (0.27%) SDET
13 8 (0.18%) SEPA
14 7 (0.15%) Basel II
15 4 (0.088%) RMADS
15 4 (0.088%) TickIT
16 3 (0.066%) COBIT
System Software
1 255 (5.63%) Active Directory
2 243 (5.37%) VMware Infrastructure
3 228 (5.04%) Docker
4 91 (2.01%) Veritas Cluster Server
5 78 (1.72%) NFS
5 78 (1.72%) vSphere
6 64 (1.41%) Oracle RAC
7 63 (1.39%) HDFS
8 58 (1.28%) Virtual Machines
9 52 (1.15%) VMware ESX
10 43 (0.95%) Veritas File System
11 39 (0.86%) Hyper-V
12 38 (0.84%) Veritas Volume Manager
13 32 (0.71%) Samba
14 27 (0.60%) Time Sharing Option
14 27 (0.60%) Virtual Servers
15 25 (0.55%) Apache ZooKeeper
16 24 (0.53%) vCloud
17 23 (0.51%) GPFS
17 23 (0.51%) Tivoli Workload Scheduler
Systems Management
1 479 (10.58%) Puppet
2 337 (7.44%) Ansible
3 285 (6.30%) Opscode Chef
4 116 (2.56%) Nagios
5 90 (1.99%) Tivoli
6 70 (1.55%) Tivoli Storage Manager
7 65 (1.44%) Control-M
8 58 (1.28%) NetBackup
9 54 (1.19%) Data Guard
10 47 (1.04%) HP Quality Center
11 45 (0.99%) Hadoop YARN
12 41 (0.91%) QRadar
13 38 (0.84%) Oracle RMAN
14 36 (0.80%) Kibana
14 36 (0.80%) logstash
15 34 (0.75%) Graphite
16 33 (0.73%) Dollar Universe
17 32 (0.71%) Nessus
17 32 (0.71%) Red Hat Satellite
18 31 (0.68%) Oracle Enterprise Manager
Vendors
1 1359 (30.02%) Oracle
2 541 (11.95%) Red Hat
3 459 (10.14%) VMware
4 393 (8.68%) IBM
5 345 (7.62%) Microsoft
6 255 (5.63%) HP
7 228 (5.04%) Cisco
8 180 (3.98%) Sybase
9 147 (3.25%) Sun
10 138 (3.05%) Veritas
11 131 (2.89%) Splunk
12 105 (2.32%) NetApp
13 96 (2.12%) SAP
14 92 (2.03%) Citrix
15 91 (2.01%) Informatica
16 90 (1.99%) Atlassian
16 90 (1.99%) EMC
17 68 (1.50%) TIBCO
18 67 (1.48%) F5
19 66 (1.46%) Google
West Midlands
Venn Group
Rate: £50000 Per Annum
Posted: 1 hour ago
Glasgow, Lanarkshire
FPSG Connect
Posted: Yesterday
Redhill, Surrey
LEXSTRA
Rate: £450 - £550 per day
Posted: 5 hours ago
Glasgow, Lanarkshire
Harvey Nash plc
Posted: 21 hours ago
Central London / West End
Digital Gurus
Rate: £450 - £500 Per Day
Posted: Yesterday
West London
Michael Bailey Associates
Rate: Market Rates
Posted: Yesterday
City, London
ANSON MCCADE
Rate: £300 - £340 per day on a 3 month rolling contract
Posted: Yesterday
Nottingham, Nottinghamshire
Experis Ltd
Posted: Yesterday
City, London
Pioneer Search
Rate: £575 - £625 per day
Posted: 2 days ago
Swindon, Wiltshire
Austin Fraser
Rate: £375 - £475 per day
Posted: Yesterday
Surrey
Proactive Appointments
Posted: 3 days ago
London
Hydrogen Group
Posted: Yesterday
Clydebank, Dunbartonshire
Harvey Nash plc
Posted: 2 days ago
Redhill, Surrey
LEXSTRA
Rate: £425 - £450 per day
Posted: 2 days ago
Central London / West End
Nationwide People Ltd
Rate: £350 - £400 Per Day
Posted: Yesterday
Crawley, West Sussex
Capita Resourcing - IT Resourcing
Rate: £240 - £280 per day
Posted: Yesterday
Bedfordshire
TEKsystems
Rate: £395 - £455 per day
Posted: 2 days ago
Northern Ireland
Harvey Nash plc
Rate: £400 - £465 per annum
Posted: 21 hours ago
Bedfordshire
TEKsystems
Rate: £395 - £455 per day
Posted: Yesterday
Bristol, Avon
Computer People
Rate: £200.00 per day
Posted: 3 days ago
London
Careerwise UK Limited
Rate: £475 - £500 per day
Posted: 2 days ago
Wales
X4 Group
Rate: £400 - 500 per day
Posted: 3 days ago
Cardiff, South Glamorgan
Spring Technology
Posted: Yesterday
Cardiff, South Glamorgan
HAYS INFORMATION TECHNOLOGY
Rate: £Market rate
Posted: Yesterday
Central London / West End
Candour Solutions
Rate: Above Market Rates
Posted: 2 days ago
London
Experis Ltd
Rate: £500 - £540 per day
Posted: 3 days ago
City, London
ANSON MCCADE
Rate: £300 -£400pd
Posted: 6 days ago
Cardiff, South Glamorgan
HAYS INFORMATION TECHNOLOGY
Rate: £Market rate
Posted: 23 hours ago
London
Bridge Noble
Rate: £400 - £500 per day
Posted: 2 days ago
City, London
ANSON MCCADE
Rate: £300- £400
Posted: 5 days ago