You need to be on the ULTIMATE plan or the PRO plan with the "Repetition" feature selected.
In WEEK PLAN, you can set tasks to repeat at given frequency (daily, weekly, monthly, ...).
After having created a repetition, you can edit the whole series or edit a single occurrence.
1. Click on the parent task,
2. Click the "Repeat" Icon
3. Mark "This task repeats"
4. Set up the frequency and duration of repetition from the options provided
List of type of repetitions you can set
Repeats daily every 2 days until 2018-01-01.
Repeats weekly every 1 week on Monday, Tuesday until 2018-01-01.
Repeats monthly every 1 month on 5th day of the month until 2018-01-01.
Repeats monthly every 3 month on 2nd Monday of the month until 2018-01-01.
Repeats yearly every 1 year until 2018-01-01.
Attachments, comments, subtasks are not included in the repetition.
Customer support service by UserEcho