Holidays

Swedes enjoy their holidays with religious fervor and the day before a holiday is often (inofficially) treated as a holiday too. This is particularly true of Thursday before Easter, Midsummer Eve on June 24, Christmas eve o Dec 24 and New year's eve.

Holidays with fixed dates:

January 1
January 6
May 1
June 6 (Constitution day)
June 25 (Midsummer day)
December 25 and 26.

Holidays without fixed dates:

Easter; Good Friday, Easter Eve, Easter Sunday, and Easter Monday.
Pentecost; Whitsun Eve, Whit Saturday but not Whit Monday anymore.
All Saints Day

Literature on Swedish Holidays

There are several books where you can read about Swedish holidays; Sweden by Tracey Boraas and Modern-Day-Vikings A Practical Guide to Interacting with the Swedes by Christina Johansson Robinowitz and Lisa Werner Carr. More books are listed here on Print Google.