About Civil Services Examination Schedule:

1.UPSC Advertise normally in the month of December/January/February in : EMPLOYMENT NEWS
2.Preliminary Examination of objective type held every year in : MAY
3.Preliminary Examination result : AUGUST/SEPTEMBER
4.Mains Examination Descriptive type held in : OCTOBER/NOVEMBER
5.Mains Examination result : MARCH
6.Personality Test(Interview) : APRIL/MAY at New Delhi
7.Final result : MAY

As I have mentioned above UPSC every year published notification for the following posts:

1. Indian Administrative Service.
2. Indian Foreign Service.
3. Indian Police Service.
4. Indian P & T Accounts & Finance Service, Group ‘A’.
5. Indian Audit and Accounts Service, Group ‘A’.
6. Indian Revenue Service (Customs and Central Excise), Group ‘A’.
7. Indian Defence Accounts Service, Group ‘A’.
8. Indian Revenue Service (I.T.), Group ‘A’.
9. Indian Ordnance Factories Service, Group ‘A’ (Assistant Works Manager, Administration).
10. Indian Postal Service, Group ‘A’.
11. Indian Civil Accounts Service, Group ‘A’.
12. Indian Railway Traffic Service, Group ‘A’.
13. Indian Railway Accounts Service, Group 'A'.
14. Indian Railway Personnel Service, Group ‘A’.
15. Post of Assistant Security Commissioner in Railway Protection Force, Group ‘A’
16. Indian Defence Estates Service, Group ‘A’.
17. Indian Information Service (Junior Grade), Group ‘A’.
18. Indian Trade Service, Group 'A' (Gr. III).
19. Indian Corporate Law Service, Group "A".
20. Armed Forces Headquarters Civil Service, Group ‘B’ (Section Officer’s Grade).
21. Delhi, Andaman & Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Civil Service, Group 'B'.
22. Delhi, Andaman & Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Police Service, Group 'B'.
23. Pondicherry Civil Service, Group 'B'.
24. Pondicherry Police Service, Group 'B'.