It has been 41 years since Memorial Day officially became a national holiday, recognized on the last Monday of every month with a special moment of silence for lost soldiers and troops at 3 p.m. local time.
But, according to the U.S. Department of Veterans Affairs, the first form of the holiday was in 1868 as Decoration Day on May 30, a time to decorate the graves of those who had died at war.
Groups across San Diego County will be honoring the nation's service members throughout the day: .
Here's what you need to know about how the holiday affects city and county services:Services Memorial Day (Monday) San Diego County Offices Closed City of San Diego Admin. Offices Closed Post Offices Closed
Regular Mail Delivery No Trash Pickup None on Monday; one day later. City and County Libraries Closed County Animal Shelters Closed