It's the date Lois punched in as a six digit code while she's hold captive with Aunt May to stop Baines bomb count down.
You mean when Lois is held captive with Wandamae Walldecker by Gretchen Kelly, right?
Good catch ... I checked the script and it doesn't say which numbers she punched in, just that it's the date of her and Lex's wedding. It's been too long since I've seen the actual episode to remember if we can see the numbers she presses or not, but it's worth looking out for next time you see it!
Kathy (who loves how FoLCs remember the tiniest details)
