How to write a leave note?

Take my father's 70th birthday as an example. The contents of the invitation letter are as follows:

1, dear friends and family:

Hello!

Today is my father's seventieth birthday. Fortunately, I am in good health, and my children and grandchildren are all around my knees. Sincerely invite friends and relatives to get together and have a happy, peaceful and happy birthday as a loving father.

Time: 202 1 x month xx, lunar month xx, week x noon x.

Venue: xx Hotel, xx Street, xx District, xx City

Inviter: xx

2. Mr./Ms. 2.xx:

Hello!

202 1 X xx (X xx in lunar calendar) is my father's seventieth birthday. In order to thank my father for his kindness, we will hold a 70th birthday banquet for my father at xx Hotel, xx Street, xx District, xx City. We sincerely invite you to celebrate with your family. Please take time to attend.

Inviter: xx