The Holy Prophet Haggai was the tenth of the Twelve Minor Prophets. He was of the Tribe of Levi and he prophesied during the times of the Persian emperor Darius Hystaspis (prior to 500 B.C.). Upon the return of the Jews from the Babylonian Captivity, he persuaded the people to build the Second Temple at Jerusalem, and he proclaimed that the Messiah would appear in this Temple in the last times.
It is believed that Haggai was buried with the priests at Jerusalem, since he was descended from Aaron. - oca.org.
Troparion — Tone 2
We celebrate the memory / of Your prophet Haggai, O Lord; / through him we beseech You: / save our souls.
Kontakion — Tone 4
Podoben: “Today You have shown forth...” / Illumined by the Spirit, your heart was a vessel of illustrious prophecy, / seeing far-off things as though they were present. / Therefore, we venerate you, glorious prophet Haggai.