Beitzah 34b Oneg Yom Tov - אי יום טוב קובע למעשר

Matmonim: Daf Yomi by Rabbi David Lapin - A podcast by Rabbi David Lapin

The mitzvah of pleasure, Oneg, applies on Yom Tov as much as it applies on Shabbat. However, there are some unique aspects to Oneg Shabbat that do not apply to Yomtov. Oneg Shabbat builds up throughout the six days of the week whereas Oneg Yomtov is only on the day itself.Sources