This is something you want to know in case its brought up on your first date.
If you don’t know this, the other person may have suspicions on how many other online dating sites you’re on and how many online conversations you’ve had with others.
You don’t want your date feeling they’re not important enough. If you don’t think you can remember it, take a screen shot it and have it set as your phone’s screensaver for that night.
The other person shouldn’t see it, as your phone should be out of sight for the whole date anyway.