April 10th is “Siblings Day”.
This day is a memorial day to celebrate the relationship between brothers and sisters and takes place in some parts of the United States.
・References
– National Day Calendar: NATIONAL SIBLINGS DAY | April 10
This day is a memorial day to celebrate the relationship between brothers and sisters and takes place in some parts of the United States.
・References
– National Day Calendar: NATIONAL SIBLINGS DAY | April 10