Glad Lucia! Or in English, happy St Lucy's day!
Today is St Lucy's day and she is as usually celebrated all over Sweden and the neighbouring countries with singing and candles. A bit odd when you think about it, that an italian saint is celebrated in a mostly Lutheran part of Europe. And as usual it is probably a mixture of pre-christian traditions mixed with christian traditions that survived the reformation. In the Julian calendar, the 13th was the winter solstice and the darkest day of the year, so Lucia is a celebration of light. The tradition is old, but it was revived in the 19th century and gained a lot of popularity. It has even spread to other countries.
This year, everything has been done a bit different for obvious reasons. But the great thing about that is that you can take part in the celebration no matter where you are in the world. SVT, the public service broadcaster, has as always broadcast their Luciamorgon (Lucia morning) which you should be able to to watch no matter where you are in the world: https://www.svtplay.se/video/29267198/luciamorgon-fran-jukkasjarvi It is usually not that strictly traditional, but rather a mix of old and new, traditional songs and more modern songs. This year it is recorded in Jukkasjärvi in northern Sweden.
But many choirs who can't do their traditional performances are doing them online so there are many available for those who are interested in Swedish traditions, or just want a bit of light in the darkness.
Adolf Fredrik's music school: https://www.youtube.com/watch?v=BwBJa5l-jSs
Uppsala Cathedral's childrens choirs: https://www.youtube.com/watch?v=3AaS4JUFcTU
Skansen: https://www.youtube.com/watch?v=YbXhPjrJx58 (with english subtitles)