You should put your health first.
My first preference is Feb 14th and my second preference is Feb 21st.
What was your first impression of the famous blowfish family?
The ordinal number prefix one refers to the first thing. This is the number one place you can get. In fact, it's simply the best.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.