This weekend is Easter, one of the biggest Christian celebrations. Because of this shops and supermarkets might be closed or opened only partly between Friday and Monday. Also buses might operate on weekend or holiday schedule and might not be available as often as normally. Also authorities like the KEP or the Greek Asylum Service will be closed this Friday the 26th of April and Monday, 29th of April. Everything will be reopened on Tuesday the 30th of April. Happy Easter to everybody!
Announcement of the Asylum Service: http://asylo.gov.gr/en/?p=4475