22 Apr 2022-once In A 1,000 Years-jupiter, Venus, Mars, And Saturn =1st Earth Day 22 April 1970

ONCE in 1000 years
From the bottom ,
Jupiter ,Venus ,Mars and Saturn .
21 April 2022 ~ 4.30 am
Photographer: Nana Glen

 

This occurs once every 1000 years
Credit: Planetary Landscapes

 

was 52 years anniversary
for the earth day

 

EARTH DAY
22 apr 2023 - 53 years

EARTH DAY
22 april 2022 - 52 years

EARTH DAY
22 APRIL 2021 - 51 YEARS

EARTH DAY
22 APRIL 2020 - 50 YEARS

first earth day
22 april 1970

davis, ca - jose arguelles

and; also
in washington, dc

Earth Day Founder on What to Know About the First Earth Day | Time

https://time.com/5570269/earth-day-origins
WebApr 19, 2019 · Though Earth Day has been dogged by rumors that it was founded by a murderer and as communist propaganda, the truth is much more straightforward — but no less fascinating.

 

so;
22 april 2022 = 52 years

22 april 2021 = 51 years

22 april 2020 = 50 years

NOW

22 april 2023 = 53 years

 

article here
The First Earth Day (history.com)
https://www.history.com/this-day-in-history/the-first-earth-day