It’s Cinco de Mayo time, and festivities are planned across the US. But in Mexico, not so much

The United States is gearing up for Cinco de Mayo. Music, all-day happy hours and deals on tacos are planned at venues across the country on Sunday — May 5 — in a celebration with widely misunderstood origins that is barely recognized south of the border.

In the U.S., the date is largely seen as a celebration of Mexican American culture stretching back to the 1800s in California. Typical festivities include parades, street food, block parties, mariachi competitions and baile folklórico...