Sunny Sunday Always Spoils My Day

Rarely is it sunny in ChongQing in Winter (It's a sunny Sunday today.It's not usual sunny in winter of ChongQing), so today people here are excited (always find it exciting) and are (like to go) out enjoying the Sunday sunshine.

I awoke (got up) late this morning,and looked out of window. ( ,) "What a lovely day" I thought" It's great to have a nap on such a day" and (.) then (,I)  fell asleep again.
When I finally got up, it was (it's) half past one/1.30 pm. After having a quick lunch,I went out and planned (planed) to finish my work left over from yesterday. On the way to my company (firm),I saw a crowd of people sitting on the lawn and others walking in the square, (taking a walk on square ,) seemingly killing time. (who were killing their leisure time.) Why not have a cup of coffee? It's really rare to have such a beautiful Sunday. Then, as I stopped to enjoy (take) a large (big cup of) coffee (and) sat there in the garden (gardon), a feeling of relaxation came over me and I began to read and  enjoy/savour this moment. ( the life.)
The afternoon passed quickly. Soon, it was (it's) time for (to have) dinner, next up was (there also is) an important football match in the evening, (which is) the AFC Champions Final. I have no time to finish my work,I know that!
But we should look on the bright side should we not? (of things,is it right?) At least I enjoyed my (the) day. After all, sunshine doesn't come every Sunday, but my work is with me every day. (being here everyday.)

Very well written and amusing to read. Such a litany of excuses why not to work.....haha....enjoy!

Sunny Sunday alway spoils my day

It's It was a sunny Sunday today._It's not usual usually sunny in winter of in Chongqing,_so people here always find it exciting and like to go out enjoying to enjoy the sunshine. 
I got up late this morning,_and looked out of a window. "What a lovely day," I thought,_ "It's great to have a nap be napping on such a day"._Then,_I fell asleep again.

Always put a space after punctuation, and never before.

Also, always use full stops at the ends of sentences.

When I finally got up,it's it was half past one pm in the afternoon._After having a quick lunch,_I went out and planed planned to finish my work that I left yesterday._On the way to my firm work,_I saw a crowd of people sitting on the lawn,_taking a walk on in a square,_who were killing their leisure free time.

You already omitted "who were" before "taking a walk". You can't add it again after omitting it.
If you'd like, you can say "I saw a crowd of people sitting on the lawn, who were taking a walk in a square, killing their time."

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Sorry for posting this in two parts. Italki wasn't letting me write any more, so I just posted what I had written.

Why not have a cup of coffee?_It's really rare to have a beautiful Sunday._Then,_I stopped to take a big cup of coffee and sat in the gardon garden._I began to read and enjoy the life. 

The afternoon passed quickly._Then its it was time to have dinner._There also is was an important football match in the evening,_which is was the Afc AFC Champion's Final._I have had no time to finish my work._I know knew that!
But we should look on the bright side of things,is it right shouldn't we?_At least I enjoyed the day._After all, sunshine doesn't come every Sunday,_but work being here we work here everyday.