No Offense, But We Should Be Asking You These Questions. What Does The Vehicle’s Owner’s Manual / Maintenance Information Say ? What Estimates Have Your Mechanic And Or Honda Dealer Given You ?
If you have no vehicle documents, get them. Follow them. I would just have to believe that if the car has a timing belt then it came with information regarding its replacement interval.
If you have no trusted repair facility, get one or head to a dealer.
This makes me wonder if there are other maintenance items you are late on or have neglected. Although it’s good that you are at least thinking about maintaining the vehicle (some owners wait til it dies), it would behoove you to take a more active role in vehicle ownership. My recommendation is to get the Honda maintenance schedule and follow it.
CSA