Bug: Target Start and Target End fields store incorrect values in CEST within jira create rest calls

Environment

OS Ubuntu Server 16.04, Jira Software 7.1.10 , jdk 1.8.0_171-b11, Portfolio 2.13.1
OS Windows 10, Jira Software 7.10.1, jdk 1.8.0_172, Portfolio 2.13.3

Steps to Reproduce

• Start Jira and add the Due date, Target Start (e.g. customfield_10109), Target End (e.g. customfield_1011) fields to the create issue screen (e.g. for Epics)
• Shutdown Jira
• Set the timezone of the OS to UTC
• Start Jira
• Create an Epic using the rest interface of jira http://SERVER/rest/api/2/issue (POST)

  {
     "fields":{
        "project":{
           "key":"TP"
        },
        "issuetype":{
           "name":"Epic"
        },
        "summary":"Some Epic",
        "duedate":"2018-03-03",
        "customfield_10104":"Some Epic",
        "customfield_10109":"2018-02-02",
        "customfield_10110":"2018-03-03"
     }
  }
  

• Issue will have the following values:
  • Target start 2018-02-02
  • Target end 2018-03-03
  • Due date 2018-03-03
• Shutdown Jira
• Set the timezone of the OS to CEST
• Start Jira
• Create an Epic using the rest interface of jira http://SERVER/rest/api/2/issue (POST)

  {
     "fields":{
        "project":{
           "key":"TP"
        },
        "issuetype":{
           "name":"Epic"
        },
        "summary":"Some Epic",
        "duedate":"2018-03-03",
        "customfield_10104":"Some Epic",
        "customfield_10109":"2018-02-02",
        "customfield_10110":"2018-03-03"
     }
  }
  

• Issue will have the following values:
  • Target start 2018-02-01
  • Target end 2018-03-02
  • Due date 2018-03-03

Expected Results

The time zone of the operating system should not cause any problems.

Actual Results

One day is deducted from the Target start / Target end fields.

Note

Note that this bug will impact rules configured with the add-on Automation for Jira, if these rules are automatically setting the Target Start and End fields from Advanced Roadmap. For more information, please refer to this KB article