In the midst of the coronavirus outbreak, Emily Cook, a writer for DWM, proposed that everyone do a simulcast rewatch of The Day of the Doctor, using the hashtag #SaveTheDay. On the 21st of March, 2020, that happened. In fact, it happened so much that Based Moff returned to not only livetweet the episode—utilising a temporary Twitter account—but also to write a short introductory minisode, à la the original DOTD cinema introductions. You can watch that here.
Below are all of Moffat's tweets, archived for your perusal (and to circumvent the inevitable deactivation of his account).