The concept of "tooth hardening day," "anti-gravity day," and "full moon gruel festival" are not commonly found in any specific country's calendar. They seem to be fictional or invented events. Different countries may have unique festivals and observances, but these particular examples have no widespread cultural significance.
japan
Japan Sure?
Japan. Only the zany Japanese could come up with such ideas.
Country Calendar was created in 1966.
The duration of Country Calendar is 1800.0 seconds.
Wild In the Country - festival - ended in 2008.
Wild In the Country - festival - was created in 2004.
No. Much of the world uses the Julian calendar, which includes an extra day in Leap Year, and the Hebrew calendar includes a leap MONTH every few years, but the Islamic calendar does not. However, even in the parts of the world that use traditional non-Julian calendars, the standard western calendar is understood and used for the purposes of most international commerce and communications needs.
1966
Wandong Country Music Festival was created in 1972.
Country Stampede Music Festival was created in 1996.
Tamworth Country Music Festival was created in 1972.