יום בכורים is one of the names for Shavout. It's the holiday of the fresh fruit. One tradition used on יום בכורים is taking the first sheaf of barley that has rippened and wave it in the air, it's a sign to symbolize the beginning of the omer.
Another name for shavout is חג הקציר. חג הקציר is more focused on the plowing part of the holiday. One tradition done in חג הקציר is using a scythe to cut your harvest.
Shavout is another name of the holiday, it's usually the main name me use. Shavout begins the day after the seventh week of the Omer. One tradition is that we eat two challahs made from the wheat of the harvest. It's one of the first items we eat that are chametz after passover.
The final name for shavout is זמן מתן תורתינו. זמן מתן תורתינו is not mentioned in the Torah, but is a very important part in Jewish history. זמן מתן תורתינו is when God gave Moses the Ten Commandments. One tradition is that you study Torah and the book of Ruth all night.
Bibliography: (I don't know how to link on this so bare with me) https://he.wikipedia.org/wiki/%. D7%A9%D7%91%D7%95%D7. %A2%D7%95%D7%AA http://www.alephomegaministries.com/ feasts-of-the-lord/first- fruits-yom-bikkurim.