Zechariah 7:1-3

1In the fourth year of [the reign of] King Darius [of Persia], the word of the Lord came to Zechariah on the fourth day of the ninth month, which is Chislev (Dec 7, 518 b.c.).

2Now the people of Bethel had sent Sharezer and Regem-melech and their men to seek the favor of the Lord,

3speaking to the priests who belong to the house of the Lord of hosts and to the prophets, saying, “[Now that I am returned from exile] shall I weep in the fifth month [mourning the destruction of the temple], and fast as I have done these many years [in Babylon]?”