I received this e-mail today:

Attention ticket holder!



Message sent on behalf of the MetLife Stadium in East Rutherford, NJ:

We just learned that your upcoming event has been rescheduled:

Bon Jovi
MetLife Stadium
Wednesday, July 24th at 7:30PM New date: Saturday, July 27th at 7:30PM!

Dear Valued Fan,



Due to scheduling considerations, Bon Jovi’s MetLife Stadium show has been moved from Wednesday, July 24th to Saturday, July 27th. Legendary rockers and special guest The J. Geils Band will open for Bon Jovi when the New Jersey icons return to their home turf on Saturday, July 27th.

It seems to be legitimate, and the date has been changed on Ticketmaster, but unsurprisingly, there has been no official announcement from Bon Jovi yet. I doubt they will ever announce the "real" reason for the change, but I think some possibilities are that ticket sales were low, and they thought that rescheduling it to a weekend would increase ticket sales, the J. Geils Band was unavailable on the originally-scheduled date, or they have confirmed that Richie is not returning, and Phil was unavailable on the originally-scheduled date.