Looks like the dailies are later comics and the Sundays are going to be earlier comics that were rerun in the nineties (so right now it’s a rerun of a rerun, if that makes sense).
You can tell because this and last week’s Sunday use the format that Bill used before the nineties when he was allowed to make his own Sunday format.
The date may be referring to the time this was rerun because if you look at the other C&H Sunday comics from that year, you can see a notable difference.
“The same thing every unicorn’s presentation is always about, Phoebe. Trying to take over the world.”