A notable event which marks the beginning of such a period.
A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs).
A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time.
A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.
One complete presentation of the training data set to an iterative machine learning algorithm.
To divide (data) into segments by time period.
A period of seven days beginning with Sunday or Monday.
A period of five days beginning with Monday.
A subdivision of the month into longer periods of work days punctuated by shorter weekend periods of days for markets, rest, or religious observation such as a sabbath.
Any period of seven consecutive days.
Seven days after (sometimes before) a specified date.