The San José Sighting Assembly

Members of the CCMCR gather at the mosque and surrounding elevated Central Valley viewpoints on the 29th of each lunar month to spot the crescent moon after sunset.

Tropical Atmospheric Conditions

Because clouds can envelop the Central Valley during the green season, observers on the Pacific coast in Guanacaste provide reliable secondary sighting reports.

Day Transition Dynamics

The civil calendar updates at 12:00 AM midnight (America/Costa_Rica, UTC-6), while religious observance begins at sunset with the Maghrib prayer.