Write an e-mail to your friend asking him to join you for a picnic.
Answers
Answer:
Dear "your friend name",
I'm really sorry that I couldn't be at your birthday party. I know that you might be angry with this now.
My mom, had a stroke just before I was going out to be at the party. I had to take her to the hospital and stay all the night there, that why I had forgotten to make a call to let you know about. Today we took her from hospital and got her back to the home. Thanks God, she's now getting better, Doctors told me that they are optimistic about her recovery.
Now I'd like to invite you to have a meal ,on Friday, at a very lovely restaurant, close to our home. Honestly, my mom asked me to join us, as she feels that her illness spoiled the time we could get together, and should do something to make up for this.
Sorry again and hope we can have all that good days again.
Regards,
"Your name"