See this area on your logbook page - the link that says how to recreate ...

It leads to this blog article
https://sailing-blog.nauticed.org/entering-experience-into-your-sailors-logbook
But essentially - it is easy. Follow these guidelines.
- Don't stress on exact days or exact weeks or exact months
- As the time gets farter way in histoy don't even stress on the year - close enough is good enough
- Start with the most recent time and work backward in time
- Don't even try to look up records
- Think of it like this - if you could put your right hand up in court and say "Judge, that's the best I can recall". That is good enough.
- Don't embelish
- If you feel like that is about accurate that that is good enough
- If you feel like you went out about 10 times this year then make 10 entries