Strong business name that includes the words "day" and "index".
The name "DayIndex" has eight characters and three syllables. Successful brands using three syllable names include Adobe, Santander and Heineken.
Dayindex.com is a dot com domain. Dot com domains are the most desirable domain extension in the world, famously used by websites like youtube.com. A dot com is the first thing people think of when they think of a website.