Dates

Start Date, Due Date, and any custom date field behave the same in Foundation: click the cell and a calendar pops open. Pick a date, and it saves to Jira in the right format (YYYY-MM-DD).

Set a date

Click any date cell.
The calendar picker opens automatically. If your browser doesn’t open it on focus, click the calendar icon in the input.
Pick a date from the calendar, or type one directly as YYYY-MM-DD.
Press Enter to commit, or click outside the cell.

The new date renders in your locale’s format (for example, “16 Apr 2026” or “4/16/2026”) while still being stored as an ISO date in Jira.

Clear a date

Click the cell.
Select the full value (it’s pre-selected on open) and press Delete or Backspace.
Press Enter.

The cell clears and Jira sets the date back to empty. This works for due dates and start dates alike.

Validation

Foundation prevents obvious mistakes before the value ever reaches Jira:

Years before 1970 or after 2100 are rejected.
Impossible dates like Feb 30 are rejected.
An invalid entry keeps the editor open with a red border and tooltip until you fix it.

If your Jira instance has project-specific validators (for example, “Due Date must be after Start Date”), those run server-side. A failed write shows a red toast with the error from Jira and reverts the cell.

Start Date across Jira instances

Jira doesn’t store Start Date in a consistent custom field ID across instances. Foundation figures out the right field for each issue automatically — you don’t need to configure anything.

Date formats in the grid

Each date column has its own display format. Open the three-dot menu on the column header, pick Date format, and choose between:

Locale — matches your browser locale.
Short — numeric, for example 16/04/2026.
Long — month name spelled out.
Relative — “in 3 days”, “2 weeks ago”.

The format choice is saved per view.