Reference for unit 'dateutils': Procedures and functions

`CompareDate`		Compare 2 dates, disregarding the time of day
`CompareDateTime`		Compare 2 dates, taking into account the time of day
`CompareTime`		Compares two times of the day, disregarding the date part.
`DateOf`		Extract the date part from a DateTime indication.
`DateTimeToDosDateTime`		Convert `TDateTime` format to DOS date/time format
`DateTimeToJulianDate`		Converts a TDateTime value to a Julian date representation
`DateTimeToMac`		Convert a `TDateTime` timestamp to a Mac timestamp
`DateTimeToModifiedJulianDate`		Convert a `TDateTime` value to a modified Julian date representation
`DateTimeToUnix`		Convert a `TDateTime` value to Unix epoch time
`DayOf`		Extract the day (of month) part from a DateTime value
`DayOfTheMonth`		Extract the day (of month) part of a DateTime value
`DayOfTheWeek`		Extracts the day of the week from a DateTime value
`DayOfTheYear`		Extracts the day of the year from a `TDateTime` value
`DaysBetween`		Number of whole days between two DateTime values.
`DaysInAMonth`		Number of days in a month of a certain year.
`DaysInAYear`		Number of days in a particular year.
`DaysInMonth`		Return the number of days in the month in which a date occurs.
`DaysInYear`		Return the number of days in the year in which a date occurs.
`DaySpan`		Calculate the approximate number of days between two DateTime values.
`DecodeDateDay`		Decode a DateTime value in year and year of day.
`DecodeDateMonthWeek`		Decode a DateTime value in a month, week of month and day of week
`DecodeDateTime`		Decode a datetime value in a date and time value
`DecodeDateWeek`		Decode a DateTime value in a week of year and day of week.
`DecodeDayOfWeekInMonth`		Decode a DateTime value in year, month, day of week parts
`DosDateTimeToDateTime`		Convert DOS date/time format to `TDateTime` format
`EncodeDateDay`		Encodes a year and day of year to a DateTime value
`EncodeDateMonthWeek`		Encodes a year, month, week of month and day of week to a DateTime value
`EncodeDateTime`		Encodes a DateTime value from all its parts
`EncodeDateWeek`		Encode a `TDateTime` value from a year, week and day of week triplet
`EncodeDayOfWeekInMonth`		Encodes a year, month, week, day of week specification to a `TDateTime` value
`EncodeTimeInterval`		Encode an interval as a `TDateTime` value.
`EndOfADay`		Calculates a DateTime value representing the end of a specified day
`EndOfAMonth`		Calculate a datetime value representing the last day of the indicated month
`EndOfAWeek`		Return the last moment of day of the week, given a year and a week in the year.
`EndOfAYear`		Calculate a DateTime value representing the last day of a year
`EndOfTheDay`		Calculate a datetime value that represents the end of a given day.
`EndOfTheMonth`		Calculate a DateTime value representing the last day of the month, given a day in that month.
`EndOfTheWeek`		Calculate a DateTime value which represents the end of a week, given a date in that week.
`EndOfTheYear`		Calculate a DateTime value representing the last day of a year, given a date in that year.
`HourOf`		Extract the hour part from a DateTime value.
`HourOfTheDay`		Calculate the hour of a given DateTime value
`HourOfTheMonth`		Calculate the number of hours passed since the start of the month.
`HourOfTheWeek`		Calculate the number of hours elapsed since the start of the week.
`HourOfTheYear`		Calculate the number of hours passed since the start of the year.
`HoursBetween`		Calculate the number of whole hours between two DateTime values.
`HourSpan`		Calculate the approximate number of hours between two DateTime values.
`IncDay`		Increase a DateTime value with a number of days.
`IncHour`		Increase a DateTime value with a number of hours.
`IncMilliSecond`		Increase a DateTime value with a number of milliseconds.
`IncMinute`		Increase a DateTime value with a number of minutes.
`IncSecond`		Increase a DateTime value with a number of seconds.
`IncWeek`		Increase a DateTime value with a number of weeks.
`IncYear`		Increase a DateTime value with a number of years.
`InvalidDateDayError`		Raise an `EConvertError` exception when a day is not a valid day of a year.
`InvalidDateMonthWeekError`		Raise an `EConvertError` exception when a Year,Month,WeekOfMonth,DayofWeek is invalid.
`InvalidDateTimeError`		Raise an `EConvertError` about an invalid date-time specification.
`InvalidDateWeekError`		Raise an EConvertError with an invalid Year, WeekOfyear and DayOfWeek specification
`InvalidDayOfWeekInMonthError`		Raise an `EConvertError` exception when a Year,Month,NthDayofWeek,DayofWeek is invalid.
`IsInLeapYear`		Determine whether a date is in a leap year.
`IsPM`		Determine whether a time is PM or AM.
`IsSameDay`		Check if two date/time indications are the same day.
`IsSameMonth`		Check if 2 dates are in the same month.
`IsToday`		Check whether a given date is today.
`IsValidDate`		Check whether a set of values is a valid date indication.
`IsValidDateDay`		Check whether a given year/day of year combination is a valid date.
`IsValidDateMonthWeek`		Check whether a given year/month/week/day of the week combination is a valid day
`IsValidDateTime`		Check whether a set of values is a valid date and time indication.
`IsValidDateWeek`		Check whether a given year/week/day of the week combination is a valid day.
`IsValidTime`		Check whether a set of values is a valid time indication.
`JulianDateToDateTime`		Convert a Julian date representation to a `TDateTime` value.
`LocalTimeToUniversal`		Convert local time to UTC time
`MacTimeStampToUnix`		Convert a Mac timestamp to a Unix timestamp
`MacToDateTime`		Convert a Mac timestamp to a `TDateTime` timestamp
`MilliSecondOf`		Extract the millisecond part from a DateTime value.
`MilliSecondOfTheDay`		Calculate the number of milliseconds elapsed since the start of the day
`MilliSecondOfTheHour`		Calculate the number of milliseconds elapsed since the start of the hour
`MilliSecondOfTheMinute`		Calculate the number of milliseconds elapsed since the start of the minute
`MilliSecondOfTheMonth`		Calculate number of milliseconds elapsed since the start of the month.
`MilliSecondOfTheSecond`		Calculate the number of milliseconds elapsed since the start of the second
`MilliSecondOfTheWeek`		Calculate the number of milliseconds elapsed since the start of the week
`MilliSecondOfTheYear`		Calculate the number of milliseconds elapsed since the start of the year.
`MilliSecondsBetween`		Calculate the number of whole milliseconds between two DateTime values.
`MilliSecondSpan`		Calculate the approximate number of milliseconds between two DateTime values.
`MinuteOf`		Extract the minute part from a DateTime value.
`MinuteOfTheDay`		Calculate the number of minutes elapsed since the start of the day
`MinuteOfTheHour`		Calculate the number of minutes elapsed since the start of the hour
`MinuteOfTheMonth`		Calculate number of minutes elapsed since the start of the month.
`MinuteOfTheWeek`		Calculate the number of minutes elapsed since the start of the week
`MinuteOfTheYear`		Calculate the number of minutes elapsed since the start of the year
`MinutesBetween`		Calculate the number of whole minutes between two DateTime values.
`MinuteSpan`		Calculate the approximate number of minutes between two DateTime values.
`ModifiedJulianDateToDateTime`		Convert a modified Julian date representation to a `TDateTime` value.
`MonthOf`		Extract the month from a given date.
`MonthOfTheYear`		Extract the month of a DateTime indication.
`MonthsBetween`		Calculate the number of whole months between two DateTime values
`MonthSpan`		Calculate the approximate number of months between two DateTime values.
`NthDayOfWeek`		Calculate which occurrence of weekday in the month a given day represents
`PeriodBetween`		Return the period (in years, months, days) between two dates
`PreviousDayOfWeek`		Given a day of the week, return the previous day of the week.
`RecodeDate`		Replace date part of a `TDateTime` value with another date.
`RecodeDateTime`		Replace selected parts of a `TDateTime` value with other values
`RecodeDay`		Replace day part of a `TDateTime` value with another day.
`RecodeHour`		Replace hours part of a `TDateTime` value with another hour.
`RecodeMilliSecond`		Replace milliseconds part of a `TDateTime` value with another millisecond.
`RecodeMinute`		Replace minutse part of a `TDateTime` value with another minute.
`RecodeMonth`		Replace month part of a `TDateTime` value with another month.
`RecodeSecond`		Replace seconds part of a `TDateTime` value with another second.
`RecodeTime`		Replace time part of a `TDateTime` value with another time.
`RecodeYear`		Replace year part of a `TDateTime` value with another year.
`SameDate`		Check whether two `TDateTime` values have the same date part.
`SameDateTime`		Check whether two `TDateTime` values have the same date and time parts.
`SameTime`		Check whether two `TDateTime` values have the same time part.
`ScanDateTime`		Scans a string for a DateTime pattern and returns the date/time
`SecondOf`		Extract the second part from a DateTime value.
`SecondOfTheDay`		Calculate the number of seconds elapsed since the start of the day
`SecondOfTheHour`		Calculate the number of seconds elapsed since the start of the hour
`SecondOfTheMinute`		Calculate the number of seconds elapsed since the start of the minute
`SecondOfTheMonth`		Calculate number of seconds elapsed since the start of the month.
`SecondOfTheWeek`		Calculate the number of seconds elapsed since the start of the week
`SecondOfTheYear`		Calculate the number of seconds elapsed since the start of the year.
`SecondsBetween`		Calculate the number of whole seconds between two DateTime values.
`SecondSpan`		Calculate the approximate number of seconds between two DateTime values.
`StartOfADay`		Return the start of a day as a DateTime value, given a day indication
`StartOfAMonth`		Return first date of month, given a year/month pair.
`StartOfAWeek`		Return a day of the week, given a year, week and day in the week.
`StartOfAYear`		Return the first day of a given year.
`StartOfTheDay`		Calculate the start of the day as a DateTime value, given a moment in the day.
`StartOfTheMonth`		Calculate the first day of the month, given a date in that month.
`StartOfTheWeek`		Return the first day of the week, given a date.
`StartOfTheYear`		Return the first day of the year, given a date in this year.
`TimeOf`		Extract the time part from a DateTime indication.
`Today`		Return the current date
`Tomorrow`		Return the next day
`TryEncodeDateDay`		Encode a year and day of year to a `TDateTime` value
`TryEncodeDateMonthWeek`		Encode a year, month, week of month and day of week to a `TDateTime` value
`TryEncodeDateTime`		Encode a Year, Month, Day, Hour, minute, seconds, milliseconds tuplet to a `TDateTime` value
`TryEncodeDateWeek`		Encode a year, week and day of week triplet to a `TDateTime` value
`TryEncodeDayOfWeekInMonth`		Encode a year, month, week, day of week triplet to a `TDateTime` value
`TryEncodeTimeInterval`		Try to encode an interval as a `TDateTime` value.
`TryJulianDateToDateTime`		Convert a Julian date representation to a `TDateTime` value.
`TryModifiedJulianDateToDateTime`		Convert a modified Julian date representation to a `TDateTime` value.
`TryRecodeDateTime`		Replace selected parts of a `TDateTime` value with other values
`UniversalTimeToLocal`		Convert UTC time to local time
`UnixTimeStampToMac`		Convert Unix Timestamp to a Mac Timestamp
`UnixToDateTime`		Convert Unix epoch time to a `TDateTime` value
`WeekOf`		Extract week (of the year) from a given date.
`WeekOfTheMonth`		Extract the week of the month (and optionally month and year) from a DateTime value
`WeekOfTheYear`		Extract the week of the year (and optionally year) of a DateTime indication.
`WeeksBetween`		Calculate the number of whole weeks between two DateTime values
`WeeksInAYear`		Return the number of weeks in a given year
`WeeksInYear`		return the number of weeks in the year, given a date
`WeekSpan`		Calculate the approximate number of weeks between two DateTime values.
`WithinPastDays`		Check whether two datetimes are only a number of days apart
`WithinPastHours`		Check whether two datetimes are only a number of hours apart
`WithinPastMilliSeconds`		Check whether two datetimes are only a number of milliseconds apart
`WithinPastMinutes`		Check whether two datetimes are only a number of minutes apart
`WithinPastMonths`		Check whether two datetimes are only a number of months apart
`WithinPastSeconds`		Check whether two datetimes are only a number of seconds apart
`WithinPastWeeks`		Check whether two datetimes are only a number of weeks apart
`WithinPastYears`		Check whether two datetimes are only a number of years apart
`YearOf`		Extract the year from a given date.
`YearsBetween`		Calculate the number of whole years between two DateTime values
`YearSpan`		Calculate the approximate number of years between two DateTime values.
`Yesterday`		Return the previous day.