By now, we all know Jason Aldean's wife, Brittany, is good and pregnant with the couple's second child (a girl!). In her most recent Instagram post Tuesday evening (Oct. 23), Mrs. Aldean gave a hint as to when we can be expecting the new arrival.

"Bump update...24 weeks," she posted, showing off her tummy stylishly adorned in black paneled and ruched workout leggings. By our calculations, that would put Baby Aldean arriving around Feb. 12 or thereabouts.

Jason's oldest daughter from his first marriage, Keeley, was born on Feb. 14, so this little newcomer better arrive on time in order to secure a birthday all her own. She'll be joining big brother Memphis, who turns 1 on Dec. 1; as well as middle sister Kendyl (who was born in August, and marks Aldean's only non-winter baby to date).

Aldean is all about the family lifestyle these days, having told Taste of Country Nights earlier this year that he appreciates the fact he's been able to take his son out on the road with him, something that wasn't possible when Keeley and Kendyl were younger.

"Back when [my daughters] were born, when I was touring I was on one bus with my whole band—there was 12 of us on a bus," he explained. "So I wasn’t in a position to be able to carry them out a whole lot back then."

Aldean is nominated for Entertainer of the Year in the 2018 CMA Awards, which will air live from Nashville on Nov. 14 on ABC. His single "Drowns the Whiskey" also scored nominations for Song, Single and Musical Event of the Year.

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See Pics of Jason and Brittany Aldean's Fairytale Mansion — It's for Sale: