All transportation media in Athens will follow 'Sunday & Holiday'schedules on Greek Orthodox Easter (May 5).

As noted on Easter week, buses and trolleys will run on schedules for Sundays and holidays as posted on the OASA site.

For the Athens Metro, the following frequencies were published:

Line 1 (ISAP or electric train), every 12.5 minutes from 06:00 to 23:00, and every 15' from 23:00 to 01:00 on Monday.
Line 2 (red line), every 15 minutes
Line 3 (blue line), every 12 minutes (airport schedules: every 36 minutes)
Tram lines: every 15 minutes.

Plans include adding more schedules if needed on lines to and from the Athens International Airport, the KTEL intercity buses on Kifissos and Liossion Avenues, and the port of Piraeus.