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How to add start dates and due dates to activities

Set when students can start a lesson, assessment or file submission, and when work is due.

Updated November 9, 2026

Two settings in the activity builder's Assignment panel control when students can work:

  • Available from — when students can begin. Before this moment students can see the activity but not start it.
  • Due date — sets the automatic end for chat sessions and assessment attempts, or closes new file submissions. Applied extra time can extend a chat session beyond this date.

Set one, the other, or both. Both dates are optional. For a chat activity (Chat with Sparky when you create it) or a file-upload activity (Hand in a file), the empty fields read Available immediately and No due date. For an assessment (Take a test or quiz), they read Set availability and Set due date. An empty field means no date limit at that end.

The screenshots show a chat activity. Assessments use the date fields described below.

Available from and Due date in the expanded Assignment section

Set the dates

You need Can edit access to change an activity's dates.

  1. Open the activity and click Edit activity at the top of the page.
  2. In Settings, beside the conversation, expand Assignment.
  3. Click Available from or Due date and pick a date and a time.
  4. Click Update activity to save a chat or file-upload activity, or Update assessment for an assessment.

To remove a date, clear the box and save again.

Dates and times use your browser or device's timezone, shown beside Time in the picker. Check the displayed date, time and timezone before saving.

Teachers and admins can also open an assigned activity card's ⋯ Activity actions menu, choose Manage availability, set the dates, and click Update on an activity they can edit.

When you duplicate an activity into classes, click Duplicate and assign to set each class copy's own dates before you finish. The copies start with the original activity's dates.

You can also ask Sparky to set the dates in the builder conversation. Review the resulting date, time and timezone, especially if you asked for midnight at the end of a day. Save with Update activity or Update assessment, depending on the activity type.

Chat activities: what students see

A badge on the activity page shows where the activity is in its schedule: Starts with the date while it is still to open, then the number of days left alongside Due and the date, and finally just the due date once it has passed.

Outside the activity's open window, the banner's Start a session button is hidden and the sidebar entry is disabled. This restriction applies to teachers too; use Preview in the builder if you want to try the activity yourself.

A session's automatic end is its own time limit or the due date, whichever comes first. Any applied extra-time accommodation is added to that end time, including when the due date is the earlier limit. The session is submitted automatically when that extended time runs out.

This happens even if the student has closed the page. Flint checks every minute and turns in any session that ended more than about 30 seconds ago, so the student's work is handed in for analysis at the due date or time limit whether or not their page is open. It also happens while the activity is paused. Archived sessions are not turned in, and archived work is not analysed.

Assessments

Students use Start assessment while the assessment is open. To try the questions in the builder, select the Preview tab beside Settings. See How do I see a live preview of my assignment?.

When creating an assessment, select Create assessment, check the optional dates in Review assignment settings, then select Finish creating activity. An empty Available from lets students start immediately unless the assessment is paused. Without a Due date, abandoned attempts are not automatically submitted by the deadline check. Set a due date if you want unfinished attempts handed in when the assessment closes. As with chat sessions, Flint hands those attempts in about 30 seconds after the due date even if the student's page is closed or the assessment is paused, but not attempts that have been archived.

File-upload activities

On an activity where students upload files instead of chatting, the two settings keep their names but describe submissions instead of sessions — "Set when students can start a submission" and "Set when new submissions close". An empty Available from reads Available immediately, and the button students use is Submit work.

See who hasn't handed in, and remind them

Flint does not send students automatic reminders about due dates or work they haven't handed in.

  • See who hasn't handed in. An activity's Submissions table lists only students who have started a session or a submission. The class Gradebook lists every student in the class, so it also shows the students who haven't started.
  • Remind them. Post a class announcement: everyone in the class gets a notification, and you can also email it to students. Or pin the activity to the class, and choose Yes when Flint asks whether to email the people in the class.
  • Turn in a session for a student. Teachers can hand in a chat session a student forgot to turn in; see How teachers can submit student sessions.