Your comment was probably meant to be silly, but in case not: Using wall clock time as the measure, this would mean the birds sleep later. The hour we used to

Your comment was probably meant to be silly, but in case not: Using wall clock time as the measure, this would mean the birds sleep later. The hour we used to call 4am would be called 5am. Birds will wake up at the same physical time, but what matters is what our clocks say.