hebrew date begins in evening

David ben Yosef 3 years ago 0

If the yorzeit is on כ״ה סיון, hebcal says it is June 17 (this year). The question is: since hebrew dates start at sunset, not midnight, then is the date June 17 the day on which the hebrew date starts, or ends? 

This is important to people who need to observe the yorzeit exactly on the date.