Boyf birthfay

I'm planning his birthday and we arevsoebsing the night away. His birthday us the 10th and I've tried planning it (haven't paid) but I came up with a full plan last night just waiting to put the pay in. Then he tells me to make it the 11th. When we already decided on the 10th and he knew I have been getting really stressed.

Am I in the wrong to be annoyed ?

Edit***

He changed the dates after reassuring me 10000 times right as I got the full plan done