Why "every tuesday & friday" is invalid date?
This date is invalid because of the & operator. Please use the following due date formula:
every tuesday, friday
or - even shorter:
ev tue, fri
For a complete list of supported due dates, please refer to this page: https://todoist.com/Help/timeInsert
Ok. Than why I can't add date "every tuesday @ 5pm, friday @ 6pm"?
When I add this Todoist cut it to "every tuesday @ 5pm, friday"
Sorry, if my English isn't good enough.
Unfortunately, it's not possible to specify a different due time for each occurrence of a task. You could set it to "ev tue, fri @ 5pm" and this should work, but you can't use 2 different times. We may consider adding this and more advanced recurrence syntax in the future, though, and you're welcome to vote for this request in our Votebox: http://todoist.com/Vote/showProposal/22/
For now (as a workaround), if you must set each task to a different due time, please create 2 tasks with the same name and set one to "ev tue @5pm" and the other to "ev fri at 6pm".