Q: Prepositions + this/next/last (days/festivals/months etc.)

Hello dear members, 

I want to ask you if it's correct to use prepositions before time expressions such as, 'this/next/last + a day', 'this/next/last + the name of a festival', 'this/next/last week (or month/year). 

Here're some examples to make my question more clear to you: 

- What're you going to do on this Sunday? 
- Did you see Jane on the last friday? 
- Is Peter coming home at / on this Christmas? 
- He will be retired in the next month. 

Also, please tell me the difference between this, for ex, Sunday and this coming Sunday. 

For ex, what's the difference between 'He has decided to give us a party this Sunday' and 'He has decided to give us a party this coming Sunday', please? 

Thank you all.