1·Handling leap year is fairly straightforward—add an extra day, if using the Gregorian calendar, to the year-month or day interval calculations.
处理闰年相当简单——如果使用公历，在以年月日为时间间隔的计算中添加额外的一天。
2·In most cases, use the Gregorian calendar.
在大多数情况下，使用罗马日历。
3·It falls around April 5 of the Gregorian calendar.
它是在阳历四月五号前后。
4·The Gregorian calendar was not widely adopted across the world until much later.
格里高利历法(公历)直到很久以后都未被世界采用。
5·It falls on July 15 of the lunar calendar, or mid-August of the Gregorian calendar.
这个节日在每年农历的7月15号，阳历差不多是八月中左右。
6·The Gregorian calendar has become the calendar of commerce and international transactions.
罗马日历已经成为商业和国际交易通用的日历。
7·This calendar is based on the Gregorian calendar, but the week starts on Monday instead of Sunday.
这个日历基于罗马日历，但是每周的开始是星期一而不是星期日。
8·Article 10 a budgetary year shall begins on January 1 and end on December 31 on the Gregorian calendar.
第十条预算年度自公历一月一日起，至十二月三十一日止。
9·The Mayans set this calendar to begin in the year 3114 B.C. (according to our modern Gregorian calendar).
玛雅人发明的这个历法开始于公元前3114年(根据我们现行的公历)。
10·The Lantern Festival falls on the 15th day of the 1st lunarmonth, usually in February or March in the Gregorian calendar.
元宵节是在阴历的元月15号，通常在阳历的二月或者三月。