Earth Day is observed annually on April 22.
This is a Gregorian calendar holiday — observed on the same date worldwide. There is no tithi or panchang significance to the date; it does not shift by timezone.
Earth Day is one of the festivals observed in the Hindu calendar. A detailed account of its mythology, significance, and rituals is being prepared.
Computed for Khlong Khlung (Asia/Bangkok) using local sunrise, sunset and astronomical positions.
Other observances and vrats falling in April 2027, with dates computed for Khlong Khlung.
A more detailed account of Earth Day — its mythology, regional variations, and rituals — is being prepared.