DS1307 circuit to make simple long-duration alarm? (DFR0151)

I would like to make a silent alarm which flashes an LED from 2100 hrs every evening until I press a button to reset the alarm (which could happen at any point from 2100 to 0100 so the flashing needs to remain active for as much as four hours). Would it be possible to program this DS1307 circuit to flash the light or at least turn on a flashing circuit? Or would it need a separate microcontroller? Thanks.

https://www.dfrobot.com/wiki/index.php/Real_Time_Clock_Module_(DS1307)_V1.1_(SKU:DFR0151)