At our latitudes sunrise getting earlier and sunset getting later is NOT symmetric.
Following the Solstice (as the bottom chart shows) sunsets got later, BUT the sunrises kept getting later! It was the later sunsets that made sure that the days got, just, shorter.
But, as of TODAY, January 7, 2018 all that changes.
Sunrises get earlier … and earlier. Within 15 days, sunrise will be a full 7-minutes earlier. The days would be 25 minutes longer. Yes, 25-minutes longer.
We are turning the corner and next week will be warm.