According to this story, POTUS tweeted about the wedding but cited the wrong day. Hmmm.

https://www.msn.com/en-us/lifestyle/royals/president-trump-calls-princess-eugenie-a-truly-beautiful-bride-who-has-been-through-so-much-2-days-after-her-wedding/ar-BBOmwox?ocid=spartandhp