When creating an issue in Advanced Roadmaps and populating Target start and Target end date fields, the stored dates fetched through the REST API are not all correct.

For instance, when you create an Epic and set:

• Due Date (System Field)
• Target start (ARJ field)
• Target end (ARJ field); and
• myCustomDateField (custom Date picker field)

to today (2021/12/21), the issue view shows:

Due Date:	21/Dec/21
Target start:	21/Dec/21
Target end:	21/Dec/21
myCustomDateField:	21/Dec/21

When using a -0300 TZ for Jira, the rest/api/latest/issue/BS-5 shows:

duedate: "2021-12-21",
customfield_10101: "2021-12-20", --Target start
customfield_10102: "2021-12-20", --Target end
customfield_10300: "2021-12-21", --myCustomDateField

When the Jira system TZ is changed to UTC +1, the dates are all correct:

duedate: "2021-12-21",
customfield_10101: "2021-12-21", --Target start
customfield_10102: "2021-12-21", --Target end
customfield_10300: "2021-12-21", --myCustomDateField