What is the option expiry time and date for equity options?

All stock options expire on the last “Thursday” of the month of expiry.
Different weekly options on the other hand expire on different days as follows: 

INDEXDAY OF EXPIRY
MIDCAP NIFTYEVERY MONDAY
BANKEXEVERY MONDAY
FINNIFTYEVERY TUESDAY
BANKNIFTYEVERY WEDNESDAY
NIFTYEVERY THURSDAY
SENSEXEVERY FRIDAY