I am a bit confused. When can we omit the preposition on before weekdays? (Monday, Tuesday etc.) Sometimes I read weekdays without the preposition on. If the preposition is left out, does it work the same way, or does it change the meaning?
Example without the preposition
The UGC issued the public notice Monday after its two previous orders in this regard were overlooked by the DU.
Example with the preposition
The commission on Monday also issued a public notice against the FYUP in all leading newspapers for parents and students.