'Weeks' in the Bible

"Seventy weeks is decreed for your people and {for your holy city}, to put an end to the transgression and to seal [up] sin and to make atonement for guilt and to bring [in] everlasting righteousness and to seal vision and prophet and to anoint {the most holy place}.

And you must know and you must understand [that] from [the] time of the going out of [the] word to restore and build Jerusalem until [an] anointed [one]-- leader--[will be] {seven weeks and sixty-two weeks}; it will be restored and will be built [with] streets and moat, but {in a time of oppression}.

"And after the sixty and two weeks an anointed one shall be cut off, and {he shall have nothing}, and [the] people of the coming leader will destroy the city and the sanctuary, and its end [will be] with the flood and [on] to [the] end [there shall be] war; [these] desolations are determined.

In those days, I, Daniel, I [myself] was [in] mourning {for three whole weeks}.

I had not eaten [any] choice food, and meat and wine did not enter my mouth, and {I did not use any ointment} {until the end of three whole weeks}.