National days, ongoing national weeks and months, and global observances for April 4, 2027. Plus historical events and birthdays.

April 4, 2027 celebrates National School Librarian Day, plus 6 more.
Read the full story →On 4/4, Jeep 4x4 Day launches us into adventure! Celebrate the excitement of discovery while venturing out in the open air.
Read the full story →National Vitamin C Day on April 4th each year shares all the ways vitamin C nurtures and benefits our health, inside and out!
Read the full story →Today is April 4 on the National Day Calendar and we are using World Corporate Health Day to bring attention to mental and physical health of employees. We are encouraging employees and employers to work together to stay healthy and promote healthy work environments.
Read the full story →Longer-running observances that include this date.
Showing the first 12 — See all months for April.