I blogged at the 50 day countdown to Earth Day 2020, the 50th anniversary year of this special day. Check out the post!

Alas, the massive gatherings and celebrations for the 50th anniversary of Earth Day are pretty much cancelled across the globe. But the countdown started for many of us when it was 50 days to go, and now, with 25 days until Earth Day 2020, I’m sharing where I am seeing some fun posts on Twitter. Join them (and me) as we continue the countdown!

🌎🗓 T-50 days until #EarthDay50
This year, we’re celebrating the 50th anniversary of #EarthDay. 🎉 Since the very beginning, @NASA has looked back to our home planet 🌎, helping solve environmental challenges and understand this beautiful, complex world.https://t.co/NHBK0KaqGW pic.twitter.com/oBCNiVbqMu

— NASA Earth (@NASAEarth) March 3, 2020

For the next 50 days 🗓, we’ll be sharing views of how @NASA 🛰 helps our planet as we count down to the 50th Earth Day on April 22. Follow along every day as we bring you our planet in new views and old: https://t.co/uxoTrU6pL9 pic.twitter.com/agdxisZXvJ

— NASA Earth (@NASAEarth) March 3, 2020

And from another NASA Twitter feed:

Let the countdown begin…50 days until we celebrate the 50th anniversary of #EarthDay. This image taken by Apollo 8 astronauts helped inspire the 1st Earth Day. View other historic crew images at https://t.co/iQzRX5ooMs & stay tuned for more as we countdown to Earth Day on 4/22! pic.twitter.com/wWuwJsClnp

— NASA Astromaterials (@Astromaterials) March 3, 2020

The Fairmount Water Works Interpretive Center in Philadelphia (PA) started daily postings of children’s books relating to water. Their posts stopped on March 16 (COVID-19 restructions in Philadelphia), but the books listed in each tweet up until that point are a nice collection to check out!

April 22 marks the 50th anniversary of #EarthDay! Help celebrate by reading a book a day about our Earth & water! Day 1: Try “Under Water” by Aleksandra Mizielinska and Daniel Mizielinski! #earthday #earthday2020 #fairmountwaterworks #environmentaled #watersheded #schuylkillriver pic.twitter.com/heae6qNBSk

— Fairmount Water Works Interpretive Center (@FairmountWW) March 4, 2020

I started my own countdown at the 50-day mark. As an oceanographer, each of my tweets highlight an ocean topic, scientist, technology, educational resource, etc. I’ve connected all of mine as one Twitter thread, so by clicking on the first one, you can scroll through all of them on the same page.

It’s 50 Days until #EarthDay & I’ll be counting ⬇️ each day w/something ocean related to celebrate & call attention to this spectacular Earth system so vital to our lives yet so much for us to learn. Starting off with a @NewsHour interview w/@SylviaEarle https://t.co/2YQOOTlfZ9

— Dr. G (@guertin) March 3, 2020

Have you seen any other Earth and space countdowns as the 50th anniversary of Earth Day approaches? Share them in the Comment box below!