Moths and butterflies both fall under the genus of Lepidoptera. The  study of butterflies and moths is known as lepidoptery. This is a  branch of biology and the people specâ¦ializing in this study are  known as lepidopterists. Dinosaurs aren't the only cool animals from the past.
Time Card Calculator. This tool calculates the total time worked as well as the amount earned (if an hourly rate is provided) and presents these in a weekly summary. The fields can be left blank if there is no data available. The calculator accepts most time formats, such as 8:00AM, 8.30, 15:30, etc.
Calculate Time Difference in Excel. The most simple way to calculate time differences in Excel is to simply subtract one time from the other. This works because Excel stores dates as integers and times as decimal values (see the page on Excel dates for more details).