Can't log today ??

Lauren • 31, partner is 35. We have three children, William 10, Georgia 2 & Eliza just born. I work with domestic abuse victims in the north east of England. Partner is a roofer/joiner.
My calendar says I can't log future dates (for Sunday 05/04) but I'm in the UK. And it is Sunday!! Lol could someone let me no if it's glow or if there's a setting I can change?