Formation of Haryana:
- Shah commission was set up by the Indian government under the chairmanship of justice J.C. Shah on 23rd April 1966 to carved out of Haryana from Punjab on linguistic basis
- On 1st November 1966, Haryana was carved out of Punjab State
- Haryana emerged on the Indian map as a 17th state of India by the seventh amendment of the state constitution.
- Shri Dharam veer was elected as the first Governor and Bhagwat Dayal Sharma as the first Chief Minister of Haryana.
- First speaker of assembly of Haryana was Smt. Shanno Devi.
Districts of Haryana:
| S. No. | Name of District | Formation Date |
| 1. | Ambala | 1st November 1966 |
| 2. | Karnal | 1st November 1966 |
| 3. | Jind | 1st November 1966 |
| 4. | Rohtak | 1st November 1966 |
| 5. | Mahendragarh | 1st November 1966 |
| 6. | Gurgaon | 1st November 1966 |
| 7. | Hisar | 1st November 1966 |
| 8. | Sonipat | 22nd December 1972 |
| 9. | Bhiwani | 22nd December 1972 |
| 10. | Kurukshetra | 23rd January 1973 |
| 11. | Sirsa | 26th August 1975 |
| 12. | Faridabad | 2nd August 1979 |
| 13. | Panipat | 1st November 1989 |
| 14. | Rewari | 1st November 1989 |
| 15. | Kaithal | 1st November 1989 |
| 16. | Yamunanagar | 1st November 1989 |
| 17. | Panchkula | 15th August 1995 |
| 18. | Jhajjar | 15th July 1997 |
| 19. | Fatehabad | 15th July 1997 |
| 20. | Mewat | 4th April 2005 |
| 21. | Palwal | 13th August 2009 |
| 22. | Charkhi Dadri | 16th November 2016 |
Divisions of Districts:
| S. No. | Division | Districts |
| 1. | Ambala | Ambala, Kurukshetra, Panchkula, Yamunanagar. |
| 2. | Karnal | Karnal, Panipat, Kaithal |
| 3. | Hisar | Fatehabad, Jind, Hisar, Sirsa |
| 4. | Gurgaon | Gurgaon, Mahendragarh, Rewari |
| 5. | Rohtak | Jhajjar, Charkhi Dadri, Sonipat, Bhiwani, Rohtak. |
| 6. | Faridabad | Faridabad, Palwal, Nuh. |