Allow user to insert event date and time

[iLenny]

Issue: Users will try to specify event date and time at the title. If event time or date have changed, user will need to write the whole title again with the new date and/or time.

Here is an example that demonstrate this issue:

Here is what would be nice to see (or similar):
/set_date {DATE} date input can be any day of the week (Saturday, Sunday..etc) or date format (12/7/2019)

/set_time {TIME} time input can follow formats, for instance, as: 10:30 AM CST (timezone may or may not be required, although you may have events that take place far away)

Here is how the output could look like (or similar)::
Ping Pong Club without date and time

Ping Pong Club (Saturday) just the date
Ping Pong Club (12/7/2019)

Ping Pong Club (10:30 AM CST) just time

Ping Pong Club (Saturday at 10:30 AM CST) date and time
Ping Pong Club (12/7/2019 at 10:30 AM CST)