<s>[INST] I'm not religious and I'm turning 40 in a few months. This is a big milestone for me and I want to mark it in a meaningful way. I'm thinking of holding a celebration at home with family and friends, but I'm not sure how to make it feel special or meaningful without any religious undertones. Here are a few ideas I've had: 
- Do a bonfire
- Have a birthday "book" for people to sign
- Take a group photo
- Write/ read letters to my future self
- Have a ceremonial tree planting (I have access to a plot of land)
- Make a "vision board" of my goals and desires for the next 40 years
- Create a "time capsule" to be opened at a later date
These are my thoughts so far. Do you have any ideas or suggestions?[/INST]