How long should I wait?

So I went on an amazing date last night. We got on very well and chatted and laughed all evening and we kissed at the end of the date.

I said I would let him know when I got home, but it was very late so I didn't. Is it appropriate to send him a message today just saying I got home OK and thanks for a good evening. I don't want to seem too quick to contact him as we only met yesterday.

Or should I wait for him to contact me?
How long should I wait?
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