Officials at the Griffith Park Observatory are so confident the world will not end on Dec. 21, as allegedly predicted by the Mayan calendar, that they’re keeping the observatory open past midnight on that date.

The observatory normally closes at 10 p.m. but it will remain open an extra 121 minutes to demonstrate that claims regarding the Mayan calendar, planetary alignments, rogue planets, galactic beams, and other related phenomena have no basis in fact, the observatory said in a statement.

The observatory will offer extra shows in the Samuel Oschin Planetarium at 9:45 and 10:45 p.m.

A large number of visitors is expected at the 2800 East Observatory Road site. For safety reasons, Griffith Park access roads will close at soon as the parking lot is full, no later than 10 p.m. Visitors should arrive early or be prepared to walk uphill in the dark. Bring a flashlight.

For more information, visit www.griffithobservatory.org.