I always ask hosts about this prior to confirming the sit if it wasn’t explicitly mentioned in the listing. So I go into a sit knowing with certainty what day they are leaving, what day they expect me to arrive and whether or not we will be staying with them the night.
I have noticed several posts where sitters talk about this issue happening to them on numerous occasions, and I would think that after a couple of times at the most, they would start asking about this right upfront.
I know it is possible to have things sprung on sitters last minute or issues can come up that they would not have even known to ask about ahead of time, but this isn’t one of those things.
So while yes hosts should be clear about it, it is also something sitters can easily ask about, and definitely should if it seems to be something that happens to them often.
I think it is one of those things that you learn along the way.
And for hosts, making this information clear in your listing can be very helpful and can save time on both ends.
Ideally, you would make the start date the day you want the sitter to arrive, and you would specifically mention this first day is an overlap.
Setting the start date in this way will automatically weed out people who actually wouldn’t be available for the true start date of the sit. It will also weed out people who don’t do sits that require them to spend the night with the host.
And lastly, it might open up applicants who might otherwise think they would not be available–if the sit isn’t actually starting until the next day, that usually means the sitter doesn’t need to arrive until later in the day on that night before. So if they are on another sit that they can’t leave until later in the day or are otherwise engaged, this sit would still be doable for them and they can apply.
Or if you chose to keep the start date the day you actually leave, be sure to mention there is an overlap and you actually want the sitter to arrive the day before and spell out the date explicitly. Ex. We are leaving on the 18th but would like you to arrive on the 17th.