What is the slightly longer day than March 21st in Britain?

In Britain, the day that is slightly longer than March 21st is typically around March 24th or March 25th. This variation occurs due to the tilt of the Earth's axis and its elliptical orbit, causing the length of daylight to change gradually as spring approaches. By late March, the days continue to lengthen, with sunrise occurring earlier and sunset happening later compared to the equinox.