At present, the default reminder defer options, aside from custom date, are quite limiting. I would like to suggest the following default options:
Next day (Tomorrow - currently an option)
Next Week (7 Days time)
Two Weeks
Four Weeks
Eight Weeks
12 Weeks
Custom Date

With the above, I believe these would be more appropriate timescales which would also remove the 'this weekend' and 'next weekend' options which I think are pointless.