April
April.Jan: 1- 31Feb: 31-59 or 60March: 90 or 91April: 121 or 122
It is in April. It is the 10th in a normal year and the 9th in a leap year.
In regular years, the 100th day of the year is the 10th of April. In leap years, it's the 9th of April.
December Some regions begin school in early to mid August (this gives them extra days to buffer against days off for heavy snow fall), for them day 100 may be in late November. However for most schools starting in late August or early September, the 100th day of the school year will fall somewhere in December.
Centenary means the 100th anniversay, which would be the 100th year.
Pope Valentine (Valentinus) was the 100th pope and ruled for one month in the year 827.
September
During a year that is not a leap year it is April 10. For leap years it is April 9.
During a year that is not a leap year it is April 10. For leap years it is April 9.
A 100th year Anniversary is CAlled a Cenntenial .
The 9th of April was the 100th day of the year 2000.
Every year since 1903, apart from during the world wars, This year, 2013, was the 100th race.