Month-long observances:
- Arab-American Heritage Month
- Autism Awareness Month
- Celebrate Diversity Month
- Earth Month
- National Child Abuse Prevention Month
- National Volunteer Month
- Tartan (Scottish-American) Heritage Month
Important D&I calendar dates:
- April 2 – World Autism Awareness Day
- April 2 – Good Friday (Christian)
- April 4 – Easter (Christian)
- April 8 – Yom Hashoah (Jewish)
- April 12 – Ramadan begins (Muslim)
- April 20 – Start of Rivdan (Baha’i)
- April 22 – Earth Day
- April 23 – National Day of Silence (LGBTQIAA+)