Delphi Basics : RTL By functionality : DatesAndTimes

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Type	Name	Summary

Function	Date	Gives the current date
Variable	DateSeparator	The character used to separate display date fields
Function	DateTimeToFileDate	Convert a TDateTime value to a File date/time format
Function	DateTimeToStr	Converts TDateTime date and time values to a string
Procedure	DateTimeToString	Rich formatting of a TDateTime variable into a string
Function	DateToStr	Converts a TDateTime date value to a string
Function	DayOfTheMonth	Gives day of month index for a TDateTime value (ISO 8601)
Function	DayOfTheWeek	Gives day of week index for a TDateTime value (ISO 8601)
Function	DayOfTheYear	Gives the day of the year for a TDateTime value (ISO 8601)
Function	DayOfWeek	Gives day of week index for a TDateTime value
Function	DaysBetween	Gives the whole number of days between 2 dates
Function	DaysInAMonth	Gives the number of days in a month
Function	DaysInAYear	Gives the number of days in a year
Function	DaySpan	Gives the fractional number of days between 2 dates
Procedure	DecodeDate	Extracts the year, month, day values from a TDateTime var.
Procedure	DecodeDateTime	Breaks a TDateTime variable into its date/time parts
Procedure	DecodeTime	Break a TDateTime value into individual time values
Function	EncodeDate	Build a TDateTime value from year, month and day values
Function	EncodeDateTime	Build a TDateTime value from day and time values
Function	EncodeTime	Build a TDateTime value from hour, min, sec and msec values
Function	EndOfADay	Generate a TDateTime value set to the very end of a day
Function	EndOfAMonth	Generate a TDateTime value set to the very end of a month
Function	FileAge	Get the last modified date/time of a file without opening it
Function	FileDateToDateTime	Converts a file date/time format to a TDateTime value
Function	FileSetDate	Set the last modified date and time of a file
Function	FormatDateTime	Rich formatting of a TDateTime variable into a string
Function	IncDay	Increments a TDateTime variable by + or - number of days
Function	IncMillisecond	Increments a TDateTime variable by + or - number of milliseconds
Function	IncMinute	Increments a TDateTime variable by + or - number of minutes
Function	IncMonth	Increments a TDateTime variable by a number of months
Function	IncSecond	Increments a TDateTime variable by + or - number of seconds
Function	IncYear	Increments a TDateTime variable by a number of years
Function	IsLeapYear	Returns true if a given calendar year is a leap year
Variable	LongDateFormat	Long version of the date to string format
Variable	LongDayNames	An array of days of the week names, starting 1 = Sunday
Variable	LongMonthNames	An array of days of the month names, starting 1 = January
Variable	LongTimeFormat	Long version of the time to string format
Constant	MinsPerDay	Gives the number of minutes in a day
Constant	MonthDays	Gives the number of days in a month
Function	MonthOfTheYear	Gives the month of the year for a TDateTime value
Function	Now	Gives the current date and time
Function	RecodeDate	Change only the date part of a TDateTime variable
Function	RecodeTime	Change only the time part of a TDateTime variable
Procedure	ReplaceDate	Change only the date part of a TDateTime variable
Procedure	ReplaceTime	Change only the time part of a TDateTime variable
Constant	SecsPerDay	Gives the number of seconds in a day
Variable	ShortDateFormat	Compact version of the date to string format
Variable	ShortDayNames	An array of days of the week names, starting 1 = Sunday
Variable	ShortMonthNames	An array of days of the month names, starting 1 = Jan
Variable	ShortTimeFormat	Short version of the time to string format
Function	StrToDate	Converts a date string into a TDateTime value
Function	StrToDateTime	Converts a date+time string into a TDateTime value
Function	StrToTime	Converts a time string into a TDateTime value
Type	TDateTime	Data type holding a date and time value
Function	Time	Gives the current time
Variable	TimeAMString	Determines AM value in DateTimeToString procedure
Variable	TimePMString	Determines PM value in DateTimeToString procedure
Variable	TimeSeparator	The character used to separate display time fields
Function	TimeToStr	Converts a TDateTime time value to a string
Function	Tomorrow	Gives the date tomorrow
Variable	TwoDigitYearCenturyWindow	Sets the century threshold for 2 digit year string conversions
Function	Yesterday	Gives the date yesterday

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