Health scientists are becoming more and more interested in the citrulline content of watermelon. Citrulline is an amino acid that is commonly converted by our kidneys and other organ systems into arginine (another amino acid). The flesh of a watermelon contains about 250 millligrams of citrulline per cup.
The Julian day or Julian day number (JDN) is the number of days that have passed since the initial epoch defined as noon Universal Time (UT) Monday, January 1, 4713 BC in the Julian calendar. That noon-to-noon day is counted as Julian day 0. Thus the multiples of 7 are Mondays.
As 218 out of every 900 years are leap years, the average (mean) length of this Julian year is 365.242 2222 days, which is closer to the length of the mean tropical year, 365.242 19 days, than is the Gregorian mean year, 365.242 5 days. In the year 2800 CE, the Gregorian and Revised Julian calendars will begin to differ by one calendar day.