According to the Law of Ukraine, in cases where a public holiday falls on the weekend (Saturday or Sunday), the weekend is extended by one day.

Red marks the official holidays wich are days off.

Brown marks the official holidays which are working days.

Green marks the celebrations, which change date.

4 May

• Construction of railways began in Odesa (1863).

• The Ukrainian film critic Tatiana Derevianko was born (1930/05/04 – 2001/07/27).

• «Declaration on the entry into force of OUN» was issued (1945).

• World Asthma Day is celebrated annually on the first Tuesday of May on the initiative of the World Health Organization in 1998.