Visualise when holidays overlap across countries

While planning an offsite, I needed to find a suitable week that worked for local holidays across four countries. That was harder than I expected, so this site will be easier for you if you want to see public holidays at a glance for any country in the world.

Thank you, this is very helpful for planning international travel!

It's annoying when traveling and unaware of a major national holiday, I was in Europe on All Saints Day and had no idea that everything was going to be extra crowded or closed that whole week.

Are these considering time zones as Good Friday for Bulgaria and Serbia, let's say, are shown on Thursday!