hi ! everybody .now vietnamese is 7'20 oclock .good morning ......!
the weather is cold and today i don't go to school but i wake up at 6'30 .it is very early with me.because i always wake up late .so today i fell very happy .
-----wish everybody a good day------
You can say it this way:
Hi, everybody! Good morning! It is now 7:20 in Vietnam.
The weather is cold and I don't have to go to school today but i woke up at 6:30. It's very early for me because I always wake up late. So, i feel very happy today.
-----I wish everybody a good day------
There are other options. Some may give you suggestions, too
Have a nice day!