delphi 每年、月、周、日的开始与结束的时间StartOfAYear … StartOfTheYear … EndOfAYear … EndOfTheYear


{参数是指定的年、月、周、日}
DateUtils.StartOfAYear
DateUtils.StartOfAMonth
DateUtils.StartOfAWeek
DateUtils.StartOfADay

{参数是 TDateTime}
DateUtils.StartOfTheYear
DateUtils.StartOfTheMonth
DateUtils.StartOfTheWeek
DateUtils.StartOfTheDay

{参数是指定的年、月、周、日}
DateUtils.EndOfAYear
DateUtils.EndOfAMonth
DateUtils.EndOfAWeek
DateUtils.EndOfADay

{参数是 TDateTime}
DateUtils.EndOfTheYear
DateUtils.EndOfTheMonth
DateUtils.EndOfTheWeek
DateUtils.EndOfTheDay

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