"Counting On" star Jinger Duggar is not very open about telling when the due date for her baby will be. However, fans noted that hints on the date may have come from an unlikely source: Joy-Anna Duggar and Austin Forsyth.

Forsyth and Joy merely went out to congratulate Jinger on her pregnancy, along with their other family members Jim Bob, Michelle, Jessa, Ben, Josh and Anna Duggar. However, in the course of their congratulations, they might have dropped hints as to when Jinger's pregnancy will be due.

Joy herself is pregnant; she and her husband already gave clues as to then she will give birth.

However, the most interesting part of Joy's congratulations to Jinger is when she said that "Yeah, I'm excited because it's only going to be six months longer than mine."

Jessa and the others nod to this statement, indicating that everyone is in agreement and the calculation is correct.

Jinger and husband Jeremy still did not know the gender of the baby, which means that her pregnancy is anywhere from one week to three-and-a-half months.

Their announcement was just in time, as well— most couples hold off on going public until the pregnancy is on 10 to 12 weeks.

Jinger's announcement came early January, and when fans count 12 weeks back, Jinger may have at least conceived in October. This means that she will give birth nine months after.

Fans speculate that this puts her timeline of giving birth on July 2018 at the latest.

However, this makes Joy's statement a little bit faulty. If Jinger is to give birth in July and Joy's pregnancy is "six months longer," then Joy would have to give birth this month.

One possibility is that Joy may have just miscalculated the six months she gave on her statement. Another is that Jinger may have had announced a little later than the 12-week period.

In any case, both Duggar family members are expected to give birth this month.