Today

Today is was [1] a very boring day,. All day  i  I  [2] stayed at the home, i watching TV , and learning English,. I will go to bed at now,.  i  I  hope tomorrow is very happy day.

Today was a very boring day. All day I stayed at home, watching TV and learning English. I will go to bed now. I hope tomorrow is a very happy day.

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[1] If you write "today is", the reader thinks it is still daytime.  However, you are writing at night.  You have two options:

-- "Today was a very boring day."

-- "Today has been a very boring day."

[2] The pronoun 'I' always uses a capital letter (an upper-case letter).