Strong business name that includes the words "day" and "index".
DayIndex has eight characters and three syllables. Established brands using three syllable names include McDonald's, Santander and Adidas.
Dayindex.com is a dot-com domain. Dot com domains are the most desirable top-level-domain in the world, used by famous websites like youtube.com. When most people think of a website, they think of a dot-com.