On the 3rd of April , the Hellenic Delphinia festival is observed.
The Delphinia is a festival originally dedicated to unmarried women and consisted of a procession where they held olive branches bound with white wool and its patrons are Apollo and Artemis.
This is an auspicious time to petition for protection and ask for boons to be granted.
Offer olive branches or olive oil.
Here is a hymn to Artemis which you can use as an offering prayer on the day: