When Do Days Get Shorter 2025. Northern hemisphere dwellers, or most of the earth's population, have probably all noticed longer days and shorter nights in the summer and the opposite in winter. By the fall equinox, or the first day of fall, on sept.

Northern hemisphere dwellers, or most of the earth’s population, have probably all noticed longer days and shorter nights in the summer and the opposite in winter. The winter solsitice is both the shortest day of the year and also the longest night.