(Newser) – Queen Elizabeth II is now the longest-tenured monarch in British history, surpassing her great-great-grandmother Victoria's 23,226 days, 16 hours, and 23 minutes as queen sometime around 5:30pm local time, reports the BBC. The time is approximate because no one is actually sure when regular Elizabeth became Queen Elizabeth. There are no gaps between British monarchs, so Elizabeth became queen as soon as her father King George VI died. However, he died in his sleep, and no one is quite sure exactly when he passed, explains Time.

Maclean's reports Britain rang church bells and lit bonfires to celebrate Queen Victoria's record-setting reign, but Elizabeth's day is being celebrated in more low-key fashion. "The event is important and unprecedented; just don't expect a big party," Maclean's states. Still, a flotilla of boats on the Thames was marking the occasion, and crowds cheered the queen when she appeared in public. (Read more Queen Elizabeth II stories.)

