Which day is called Gowk Day in Scotland?

I'm Scottish and I know what Gowks means but I've never heard of Gowks Day - maybe not in all parts of Scotland?

wayneaboy, yup fellow Scot Highlander here never heard of gowks 🤷🏼‍♀️

Born and bred in Scotland and know that Gowk is Scots for Cuckoo, in fact there is a large glacial boulder in our village known as the Gowk Stane. I must say I have never heard of April Fools Day being called Gowk day.

Iain, Love all the Scots here! I visited your wonderful country several years ago and can hear your most fantastic accents in your replies. 😀

I'm from North East Scotland and I've never heard of gowk.

Player Say what!?, which Scottish accent, which part did you visit?

In the North East of England a gowk is the core of an apple or pear.