The Transport Company of Debrecen (DKV) informs the passengers, that the monthly passes are valid from the day of the purchase (you can ask the day what you want) till the same day(12pm) next month.
If there is no such date the first day of the monthis the end of validity.If the last day of validity is a holiday or public holiday the pass is valid till midnight of the next working day.
Important that Saturday count as a day off.
The not validated tickets purchased in advance or from the bus, tram or trolley-bus drivers from the 1st of July 2009.have to be use till the 31st of March, using them later then that they not going to accept them.
DKV Release