4 Bible Verses about Calendars

But that day and hour knoweth no one, not even the angels of heaven, nor the Son, but the Father only.

but when the fullness of the time came, God sent forth his Son, born of a woman, born under the Law,

And he answering said to them, When it is evening, ye say, Fair weather! for the sky is red. And in the morning, A storm today! for the sky is red and lowering. Ye know how to judge of the face of the sky, and can ye not discern the signs of the times? A wicked and adulterous generation seeketh after a sign; and no sign will be given to it, but the sign of Jonah. And he left them and went away.

Now the birth of Jesus Christ was in this manner. When his mother Mary had been betrothed to Joseph, before they came together, she was found to be with child by the Holy Spirit.