Specify recurrence as n-th day of week/month/year

[hacksterous]

I have gone through the specifications of todo.txt.
Can the recurrence of an event be specified as 1st Monday of every month?
Can there be a last date of recurrence (or date beyond which the recurring
event won't occur)?

Thanks.

[zemua]

I second this, there are some clients that already implement recurrence working with todo.txt and they do it with the keyword "rec"
Simpletask: https://github.com/mpcjanssen/simpletask-android/blob/master/app/src/main/assets/index.en.md
Topydo: https://github.com/topydo/topydo
Sleek: https://github.com/ransome1/sleek/wiki/Recurring-todos-(rec:)