Jon Gosselin Downplays Big Announcement: "Today's Just Another Day"

Jon Gosselin doesn't seem too fazed by his big "life-changing" announcement with Kate on tonight's show.

When asked by RadarOnline.com at the grocery store today if he'd be happy when the much-discussed episode is over, a calm Jon said: 'Well, today's just another day."

VIDEO: Watch Jon talk about the announcement

Jon added that he has "no idea" when Kate would be coming home.

See what stars look like with Kate's hair

"I've been by myself for four days," he said. But when asked if he's happy she's gone, he said: "No, because I'm down a person."

He did say the kids were anxious for their mom to return, although when asked if he knew where she is and when she'd return to their $1.1-million estate, he answered "nope" to both.

See adorable photos of the Gosselin kids

Jon gave another impromptu press conference to fans and reporters Sunday afternoon -- Father's Day.

He told onlookers that he wasn't speaking to Deanna Hummel -- the school teacher with whom Us Weekly first reported he was having an affair -- "as much" since "the things went down."

Look back at Jon's scandalous relationship pics

When pressed to confirm if he and Kate were announcing a divorce during Monday's hour-long special, Gosselin -- who was spotted apartment hunting in NYC last week -- said you'd have "watch the show."