5: Celebration of Cinco de Mayo, the date in 1862 when a rag-tag Mexican army fought off the modern French army twice their number

8: Full moon in 2009, known as the Flower Moon or Budding Moon

11: U.S. postage rises from 42 cents to 44 cents

16: Armed Forces Day in the United States, created in 1949 to replace separate days honoring Army, Navy, Marine Corps and Air Force Days

25: Memorial Day, observed

25: Victoria Day, Canada

30: Traditional Memorial Day

Sources: www.calendar-updates.com/info/holidays/canada; www.usmemorialday.org; www.moonphases.info; www.defenselink.mil; www.vivacincodemayo.org