DaysBetween returns the number of whole days between ANow and AThen.This means the fractional part of a day (hours, minutes, etc.) is dropped. ![]() Methods exist in Sysutils (datetimeroutines) that allow reading, writing and calculating with TDateTime, converting to and from a number of formats. Number of whole days between ANow and AThen. mday is the day of the month, wday is the day of the week, starting with Sunday as day 0. The fractional part reflects the fraction of a 24-hour day without regard to the sign of the TDateTime value, so care must be taken when computing negative TDateTime values with a fractional part. The integer part is the number of days that have passed since December 30, 1899, and can be a negative number. These functions do allow for specifying manual offsets against UTC, but then you would need to keep track of those offsets - which PascalTZ does for you.TDateTime is stored as a double, the integer part representing days and the fractional part being fraction of a day. the functions use current daylight saving time etc to convert to/from UTC time). ![]() These functions can be useful and an alternative for PascalTZ if you are not interested in historical/future date/times (i.e. Free Pascal provides a simple time stamp structure named TTimeStamp, which has the following format type TTimeStamp record Time: Integer Date: Integer. Since 2.6.2, FPC has the functions LocalTimeToUniversal and UniversalTimeToLocal in the dateutils unit to convert between local time and UTC time. This means the fractional part of a day (hours, minutes, etc.) is dropped. Modified LGPL (same as the FPC RTL and the Lazarus LCL).īug reports and suggestions can be logged at GitHub:PascalTZ issues. DaysBetween returns the number of whole days between ANow and AThen. It is also used to hold just date or time values - the time and date value is ignored respectively. This library was originally published by José Mejuto in 2009 and is maintained by Denis Kozlov since 2015. It is used to hold a date and time combination. ![]() TimeZoneExists ( 'Australia/Darwin' )) PascalTZ. The SS is seconds from the beginning of the previous minute between 00 and 59. The MM is minutes from the beginning of the previous hour between 00 and 59. TimeZoneExists ( 'Africa/Lagos' )) WriteLn ( 'Australia/Darwin exists? ', PascalTZ. The time is recorded: HH:MM:SS where HH has hours after midnight between 00 and 23. FormatDateTime formats the date and time encoded in DateTime according to the formatting given in FormatStr. ![]() Convert ( DateTime, 'Europe/Paris', 'America/Chicago' ) WriteLn ( 'Time in Chicago: ', DateTimeToStr ( DateTime )) // Check if a time zone exists WriteLn ( 'Africa/Lagos exists? ', PascalTZ. GMTToLocalTime ( DateTime, 'Europe/Paris' ) WriteLn ( 'Time in Paris: ', DateTimeToStr ( DateTime )) // Convert Paris time to Chicago time DateTime := PascalTZ. DatabasePath := 'tzdata' // Current local and UTC time DateTime := Now WriteLn ( 'Local time: ', DateTimeToStr ( DateTime )) DateTime := LocalTimeToUniversal ( DateTime ) WriteLn ( 'UTC time: ', DateTimeToStr ( DateTime )) // Convert current time to Paris time DateTime := PascalTZ. Normally you can solve this with the ScanDateTime function in DateUtils where you provide for each digit the corresponding date/time code, and quote the non-digit characters: Code: Pascal Select + program Project1 uses SysUtils, DateUtils const s 'T13:57:49. To be usable in most Object Pascal code, these values must be converted to TDateTime values. Create // Load time zone database from "tzdata" directory // Download from: PascalTZ. The actual date/time format depends on the API call, and on the operating system. Uses SysUtils, DateUtils, uPascalTZ var PascalTZ : TPascalTZ DateTime : TDateTime begin PascalTZ := TPascalTZ.
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