Honor people who build and work on submarines. Celebrate the day by eating submarine sandwiches. Read more
Barbershop Quartet Day on April 11 celebrates the barbershop style of music and singing. Read more
8 4月Be Kind to Lawyers Day is an unofficial holiday that promotes kindness towards lawyers.
10 4月Siblings Day is an unofficial holiday that honors siblings.
12 4月Grilled Cheese Day on April 12 is a day that honors all kinds of grilled cheese sandwiches.
12 4月April 12 is Yuri’s Night. It celebrates the first successful human space flight and aims to increase public awareness in space exploration.