Discourse bookmarks include reminders based on a length of time.
To use this feature at the end of post click on 
then 
which will reveal
When the timer expires a user annunciation is created 
Clicking on the annunciation will open the list of personal message references
The personal message reference will containing a link to the bookmarked post.
Clicking on the link in the personal message reference will open the bookmarked post.
A recent use I had for this was that a fix was pushed but as I don’t build SWI-Prolog from source and want to test the fix, tomorrow the daily build will be ready with the patch. A quick way to be reminded is to just use this feature.