In today's vote, they said an "objective assessment" of that popular uprising is needed before declaring the day a national holiday.
Nearly all of those in the national parliament were elected in the contested balloting that helped spark the 2005 ouster of President Askar Akaev's administration.
The bill was proposed after President Kurmanbek Bakiev decreed March 24 People's Revolution Day and a holiday.
(AKIpress, Interfax)