When is it appropriate to send an invitation letter to a circle of friends for your 70th birthday?

1, Mr./Ms. XX: Today is Mr. XX's 70th birthday. Fortunately, I am in good health, and my children and grandchildren are around my knees, so I arranged a thin banquet at the Grand Hotel 1 1: 30 on X year to celebrate my mother's birthday. I sincerely invite you and your family to attend. I also take this opportunity to express my deep gratitude to the nobles, friends and relatives who have cared for and supported us! Waiting for you!

2. Dear XX, hello! I will celebrate my mother's 80th birthday on XX, and invite you to attend. Thank you.

3. It is my mother's 70th birthday, and I want to invite XX to my mother's birthday party. I'll wait for you at six o'clock and be seated at seven o'clock.

We will hold an activity to celebrate mother's 80th birthday on a certain day, a certain month and a certain time, and sincerely invite someone to come.

Dear XXX, I will hold my mother's 70th birthday party in a hotel at some time (attach the specific address). Sincerely invite you to attend and look forward to your arrival.