GSEE and ADEDY, the country's two largest umbrella labour federations representing the private and public sector respectively, will hold the main May Day rally on Tuesday morning in Athens' downtown Kotzia square, under the slogan "No one alone, together we can succeed".

The two federations also called on the workers in Greece to attend the May Day rallies in all the urban centers throughout the country.

The GSEE-ADEDY rally will begin at 10:00 on Tuesday morning in Kotzia Square, while the Communist Party of Greece (KKE) affiliated PAME labour organisation will hold a parallel rally at the Hellenic Steel plant, whose employees have been on strike for more than six months.

Ships will remain docked at ports on Tuesday due to a 24-hour strike called by merchant marine engineers, while mass transit employees will hold stoppages early in the day and late at night, so that public transport will be running throughout the day to facilitate the public in attending the May Day rallies.

Mass transit employees in Athens will hold brief work-stoppages during the May Day strike in the early morning and night on Tuesday.

The Athens Metro, ISAP train and Tram services will operate normally from 8:00 in the morning to the end of the night shift, while Athens buses will run from 7:30 in the morning to 10:00 at night and the Trolleys will run from 7:00 a.m. to 10:00 p.m.

The Hellenic Rail employees and Proastiakos suburban railway will be observing a 24-hour strike, and thus the Metro trains will stop at the Doukissis Plakentias station and not continue to Athens Airport, which section is served by the Proastiakos.