Apparently, in projects calendar there is only the option to set up a new meeting for

daily, weekly, monthly, yearly,

but not

1. bi-weekly,
2. bi-monthly,
3. quarterly,
4. every other week,
5. every other month
6. 1st & 3rd or 2nd & 4th day of month (such meeting on 1st Monday and 3rd Monday)

This is a serious drawback -  What's the possibility that these would be added in the next couple of weeks?