Chagim 25 - cooking something that tastes better fresh; food prep that could have been made the day before

Chagim 24 - melacha is permitted only for Jews; the rule of דבר השווה לכל נפש

Chagim 23 - cooking is permitted on yom tov only for yom tov

Chagim 22 - the rule of מתוך

Chagim 21 - melachot 1: intro to melacha on yom tov

Chagim 20 - isru chag

Chagim 19 - when chag is on motzash

Chagim 18 - Havdala

Chagim 17 - mussaf and megillot

Chagim 16 - Torah Reading

Chagim 15 - Hallel

Chagim 14 - benching and yaaleh veyavoh

Chagim 13 - shmona esreh on shabbat; kiddush on chag

Chagim 12 - shmona esreh

Chagim 11 - candle lighting

Chagim 10 - preparations for the chag

Chagim 9 - the obligation to see ones rebbe on the chag; הקבלת פני רבו ברגל

Chagim 8 - aliyah laregel today

Chagim 7 - aliyah laregel when the mikdash stood

Chagim 6 - generating happiness; refraining from sadness