For the six children born to Jon and Kate Gosselin way back in the day, time isn't just flying back.
It's strapping itself into a rocket ship and blasting off at the speed of light.
On Friday, Jon shared a photo of himself and two of his kid on Instagram, writing along with the above photo of himself, Hannah and Collin a caption that reads as follows:
"Happy 15th Birthday Hannah, Collin, Alexis, Aaden, Joel and Leah!!!! Wow I can't believe you are 15!!! Time is flying by!!! I love you all very much.
"I wish you the best day ever and I hope you enjoy your birthday celebrations today and this weekend!!! Love always, Dad."
Pretty basic and pretty simple, yet also very sweet -- especially when compared to the message sent to her children by their mother, Kate.
This is because, as of this writing, Kate has said nothing at all on the subject. Not in a public forum at least.
The last several months have seen quite the role swap between these former spouses.
For many years after their divorce, Kate was the one often seen out and about with her kids... while Jon was off trying to be a DJ and, at least it appeared, totally ignoring his relatives.
However, in the summer of 2018, Jon started to post pictures online of him and Hannah.
The teenager still "belongs" to her mother, in a legal sense, but she spends a great deal of time at her dad's house these days.
Similar,y Jon stunned followers of this family late last year when he brought Collin home to live with him.
The new 15-year old has been away at some sort of special needs facility, rarely ever included in social media photos or posts with his siblings.
But Jon actually went ahead and filed for temporary custody of this son -- he actually won his case in December when Kate didn't even bother to show up in court.
Ever since, Jon has been rubbing this relationship in his ex-wife's face via a number of cute photos with Collin.
However, although Collin and sister Hannah are suddenly tight with their father, an insider previously told Radar Online that the rest of the Gosselin children are “completely aligned with their mother.”
Tension very obviously remains high between everyone involved here.
Even Jon himself said recently that all non-Hannah and Collin "aren't talking to me" these days.
In 2016, Cara told People Magazine of her dad: "I wouldn't even know what to say about him."
She elaborated at the time:
"He makes it seem like we're being kept from him, which is insane.
"He should maybe spend some time thinking about why we don't want to see him, and maybe realize that if he ever does want a relationship with us, talking about us on TV is not the way to make that happen. He doesn't even know us."
For those psyched over Kate Gosselin being silence for a change, we hate to break the following to you:
She and her twin girls are about to star in a dating show. Brace yourselves.