Specific day/puzzle solver url

[stekkedecat]

I notice you always prefill the calendar solver with today's date and the dragon calendar. would it be possible to make an endpoint to choose which values to prefill on the url? that way I would for example be able to always land on today's weekday puzzle? This would also allow for an easy addition to create a next/previous day button on the site. Would you be open to me adapting the code to do this if you don't have the time?

[horsepork]

I would definitely appreciate the same, specifically for the puzzle type.