If any of the above days fall on a weekend, then the money is due on the last work day before.
IMPORTANT NOTICE: In February, plane tickets for the group will be purchased for the group by FPU and your account will be billed for your ticket. Except in exceptional circumstances, these are non-refundable tickets. Once your ticket has been purchased, you will be billed for it even if you decide not to go. Though it is not required, FPU recommends purchasing additional cancelation insurance on your ticket.