Tu BiShvat or the "New Year of the Trees" is Jewish Arbor Day. The holiday is observed on the 15th (tu) of the Hebrew month of Shvat.
Jethro, priest of Midian, Moses' father-in-law, heard all that God had done for Moses and for Israel, God's people, how the Eternal had brought Israel out from Egypt. - Exodus 18:1
These are the rules that you shall set before them. - Exodus 21:1
The Eternal One spoke to Moses, saying: "Tell the Israelite people to bring Me gifts; you shall accept gifts for Me from every person whose heart is so moved." - Exodus 25:1-2