Under the Federal Labor Law, Sept. 16 is a mandatory day of rest and anyone who works must receive ordinary pay plus double, with Profedet offering conciliation at 01 800 911 7877 and 01 800 717 2942 and reported fines ranging from 5,675 to 565,700 pesos for nonpayment. Sept. 15 is not a federal holiday and the SEP calendar keeps classes nationwide that day, marking it as commemorative rather than a suspension. State and local authorities have approved a four‑day school break in select jurisdictions, including Baja California, Yucatán, Durango, Querétaro, Veracruz and Mexico City, with Baja California’s education authority confirming the suspension for Sept. 15 and 16. Banks will operate normally on Monday, Sept. 15 and close on Tuesday, Sept. 16 under ABM and CNBV schedules, with digital and ATM services available during the closure. Parallel coverage details localized days off beyond Mexico, including a Sept. 15 regional holiday in Spain’s Cantabria and municipal holidays in Argentina such as Trenque Lauquen on Sept. 15, Laprida and Cacharí on Sept. 16, and Maipú and Carmen de Areco on Sept. 26.