They might but on a different day and they might call it a different name.

Thanksgiving day

January 6th is Old Christmas Day. Old Christmas Day is another name for Little Christmas. Many different countries have different names for Little Christmas or Old Christmas Day.

World Youth Day for the church was always called that since it began in 1985, as far as I know.

Grandmothers Day is not a fixed date on the calendar like Mother's Day or Father's Day. It is typically celebrated on different dates in different countries. In the United States, it is observed on the second Sunday in September, while in other countries, it may be celebrated on different days throughout the year.