A task deadline and a task’s planned work interval answer different questions in Google Calendar. The interval shows when you intend to work; the deadline shows the date you expect completion. Keeping them separate avoids treating a short work block as the final cutoff.
Inspect the existing task
On a computer, click the intended task and choose Edit task. Check its current date, start and end time where present, and task list. Confirm that the entry is the actual task rather than an ordinary event with a similar name.
Set the deadline field
Beside Deadline, enter the intended due date and save. Google’s task guidance says the deadline appears in the all-day section of Calendar. Review the start-date field separately when you also want a specific period reserved for doing the work.
Do not infer an exact contractual hour from an all-day deadline marker. If a real external cutoff includes a time zone and clock time, retain that authoritative information clearly in the task’s useful supporting details.
Verify the two representations
Reopen the task and inspect both the work block and deadline date. Google’s guidance says deadline notifications arrive at nine in the morning in your local time on the deadline day. That reminder time is not a redefinition of the real due time. Check notification delivery separately on the device you rely on. Moving a planned work interval should not be described as an agreed extension from another person. The useful result is one task with a clear work plan and expected completion date, with external commitments remaining grounded in their actual source.
References
Reviewed against the linked official product guidance on November 4, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.