On which date did this act come into effect?
The dates on which the acts came into effect are as follows:

1. Bombay Reorganisation Act, 1960 (11 of 1960) - w.e.f. 1-5-1960
2. Mysore State (Alteration of Name) Act, 1973 (31 of 1973) - w.e.f. 1-11-1973
3. Orissa (Alteration of Name) Act, 2011 (15 of 2011) - w.e.f. 1-11-2011
4. Punjab Reorganisation Act, 1966 (31 of 1966) - w.e.f. 1-11-1966
5. Uttar Pradesh Reorganisation Act, 2000 (29 of 2000) - w.e.f. 9-11-2000
6. Uttaranchal (Alteration of Name) Act, 2006 (52 of 2006) - w.e.f. 1-1-2007
7. Jammu and Kashmir Reorganisation Act, 2019 (34 of 2019) - w.e.f. 31-10-2019
8. State of Nagaland Act, 1962 (27 of 1962) - w.e.f. 1-12-1963