Not exactly, but most of the holidays will be common for Central Govt. offices and PSUs. Every PSU will publish there own Holidays list taking into Holidays observed on All India basis like Shankaranthi (Pongal), Shivrathri, Deepavali, Vijaya Dhasami, Good Friday, Ramzan, May day etc., compulsory holidays like Republic Day, Independence Day, Gandhi Jayanthi, local (state govt.) holidays like New year (local) day, state formation day, etc. However they try to keep the total no.of days more or less the same.