/// <summary>
/// Gets last day of quarter
/// </summary>
/// <param name="ldt"></param>
/// <returns></returns>
public static LocalDateTime LastDayOfQuarter(this LocalDateTime ldt)
{
var currentQuarter = (ldt.Month - 1) / 3 + 1;
var firstDay = ldt.SetDate(ldt.Year, 3 * currentQuarter - 2, 1);
return(firstDay.SetMonth(firstDay.Month + 2).LastDayOfMonth());
}
/// <summary>
/// Gets first day of quarter
/// </summary>
/// <param name="ldt"></param>
/// <returns></returns>
public static LocalDateTime FirstDayOfQuarter(this LocalDateTime ldt)
{
var currentQuarter = (ldt.Month - 1) / 3 + 1;
var firstDay = new LocalDateTime(ldt.Year, 3 * currentQuarter - 2, 1, ldt.Hour, ldt.Minute);
return(ldt.SetDate(firstDay.Year, firstDay.Month, firstDay.Day));
}
/// <summary>
/// Gets previous month
/// </summary>
/// <param name="ldt"></param>
/// <returns></returns>
public static LocalDateTime PreviousMonth(this LocalDateTime ldt)
{
var year = ldt.Month == 1 ? ldt.Year - 1 : ldt.Year;
var month = ldt.Month == 1 ? 12 : ldt.Month - 1;
var firstDayOfPreviousMonth = ldt.SetDate(year, month, 1);
var lastDayOfPreviousMonth = firstDayOfPreviousMonth.LastDayOfMonth().Day;
var day = ldt.Day > lastDayOfPreviousMonth ? lastDayOfPreviousMonth : ldt.Day;
return(firstDayOfPreviousMonth.SetDay(day));
}
/// <summary> /// Gets last day of year /// </summary> /// <param name="ldt"></param> /// <returns></returns> public static LocalDateTime LastDayOfYear(this LocalDateTime ldt) => ldt.SetDate(ldt.Year, 12, 31);
/// <summary> /// Gets first day of year /// </summary> /// <param name="ldt"></param> /// <returns></returns> public static LocalDateTime FirstDayOfYear(this LocalDateTime ldt) => ldt.SetDate(ldt.Year, 1, 1);