if my memory serves me right

US /ɪf maɪ ˈmɛməri sɜrvz mi raɪt/
UK /ɪf maɪ ˈmɛməri sɜrvz mi raɪt/
"if my memory serves me right" picture
1.

used to say that you think you remember something correctly, but you are not completely certain

:
If my memory serves me right, she was born in May.
The meeting was on Tuesday, if my memory serves me right.