Northern areas, including Seattle, gain over 100 minutes of daylight in March! While daylight saving time begins on March 8, the month's biggest change is the rapid increase in daylight. By the end of March, many locations will have gained well over an hour of daylight compared with the start of the month, the most dramatic shift for any month of the year. In New York City, daylight gain is 81 minutes. In Denver, the day grows by 78 minutes. Farther north, the jump is even bigger. Seattle’s day length increases by 103 minutes. That north-vs-south difference comes down to latitude, and places closer to the poles see larger swings in daylight through the year than places closer to the equator. March also includes the spring equinox on Friday, March 20, when day and night are close to equal length.