When I was in the Marines, you were not able to wear the wool sweater (wooly pully) until DST (Daylight Savings Time) was over. No matter what the weather conditions were. Once the Daylight Savings time commenced again in April, the sweaters went back to the closet.
My daughter, (she grew up in north Idaho), shared her personal basic cold weather gear, glove liners, wool socks, etc., during her winter TBS (Marines). She was amazed at how training was not prepared or understood how to deal with cold weather.