Why not Standardise?

1. http://www.thefreedictionary.com/standardised
2. https://en.wikipedia.org/wiki/360-day_calendar
3. http://emicalculator.net/
4. http://www.marketonmobile.com/Simple-Interest-Calculator
5. http://www.rediff.com/money/2010/apr/12perfin-how-daily-interest-on-savings-accounts-is-calculated.htm
6. http://www.wikihow.com/Calculate-Simple-Interest
7. In some countries the number of days per year 360 and in many countries 365 days basis.
8. Why not standardise and make it convenient for whole world easy calculations.
9. 360 days a more suitable one for the circle has 360 degrees.