I got a text message from a massage place I go to

So I (33f) got a text message today confirming that I have an appointment tomorrow at a massage place I go to about once a year; usually for Mother’s Day or my birthday and my birthday is coming up in about 2 weeks. I did not make the appointment, and this has happened once before where my partner (32m) set it up as a surprise and I accidentally got the notification. At that time I just deleted the message and pretended it was a surprise.

So I get it and I’m super excited and I was planning on teasing my partner discreetly. So I just casually asked him over text if we’re doing anything on his days off and maybe we can do something together, like a movie night or something. He ignored my text until he got home from work, and I asked him again while trying not to give away that I know. And I gotta say, his dedication to acting oblivious is astounding. I tried asking him later if we needed to pick anything up tomorrow and he said no.

Now I’m getting worried because he isn’t making up any kind of reason why we would leave the house at all. Did he forget he made this appointment? Is he waiting last minute to get me out of the house?

Should I bring it up to remind him? But what if he’s just acting and I ruin his surprise? But what if he really forgot. He’s been super busy lately, and if I wait I might miss my appointment. I have no idea what to do! His poker face is completely throwing me off so I have no idea how I should proceed.

TL;DR
Boyfriend made me a surprise appointment for massage for birthday but is acting completely oblivious to it!

Update!

It’s currently 8:34, I just woke up and the massage place opens at 9 but I might not even need to call now.

My partner woke up at 4 am but came back to bed. He woke up when I woke up, asked how I slept and I slid in a hint, telling him my back was a little sore and I asked for him to maybe give me a back rub later. He said yeah, paused and then said, “Don’t ask me any questions, but I want you to pick out some nice clothes later.”.

Mission accomplished! I really need to tell the ladies at the front desk to send him these notifications lol

Major Update!!!
We had a fantastic day today. After my massage we went and painted pottery then went to a really nice French restaurant. When we got home he friggin PROPOSED! It was amazing and so unexpected! Apparently, he’s been planning this for the last month! Oh my god! I’m so happy and excited!