Static website advent calendar built with 25 branches for each of the different days of advent.
Serve the website as a Github page and for each day switch to the branch that is the corresponding day.\
Days that have already passed have all the collapsed content expanded with the open me button hidden.
Current day has open me button visible and content is collapsed.
When sharing links on social media, use the hyperlink (https://[github url]/#dec[day]card) to jump to the card of the day.