Khongjom Day is held on April 23. Manipur, India. This event in the third decade of the month april is annual.
Kapyong Day on April 24 (Australia, Canada, New Zealand);
International Chernobyl Disaster Remembrance Day on April 26 (A/RES/71/125);
Carabinieri Day or Shooter Day in Chile on April 27 (dedicated to the founding of this military police institution in 1927)