Short answer, yes!
Every trip has a start and end date. These dates can be in the past (or future)! So, when creating or editing a trip, simply select the correct trip dates and you are all set.
Then, when publishing your footprint posts inside this trip, you also need to select the correct date for those footprints.
TIP: You can use the date and location of the photos you're adding to a footprint. Learn more