Creates a new #GDateTime corresponding to the given date and time in
the time zone tz.
The year must be between 1 and 9999, month between 1 and 12 and day
between 1 and 28, 29, 30 or 31 depending on the month and the year.
hour must be between 0 and 23 and minute must be between 0 and 59.
seconds must be at least 0.0 and must be strictly less than 60.0.
It will be rounded down to the nearest microsecond.
If the given time is not representable in the given time zone (for example, 02:30 on March 14th 2010 in Toronto, due to daylight savings time) then the time will be rounded up to the nearest existing time (in this case, 03:00). If this matters to you then you should verify the return value for containing the same as the numbers you gave.
In the case that the given time is ambiguous in the given time zone (for example, 01:30 on November 7th 2010 in Toronto, due to daylight savings time) then the time falling within standard (ie: non-daylight) time is taken.
It not considered a programmer error for the values to this function to be out of range, but in the case that they are, the function will return %NULL.
You should release the return value by calling g_date_time_unref() when you are done with it.
a #GTimeZone
the year component of the date
the month component of the date
the day component of the date
the hour component of the date
the minute component of the date
the number of seconds past the minute
Creates a new #GDateTime adding the specified values to the current date and
time in datetime. Add negative values to subtract.
the number of years to add
the number of months to add
the number of days to add
the number of hours to add
the number of minutes to add
the number of seconds to add
Creates a copy of datetime and adds the specified number of months to the
copy. Add negative values to subtract months.
The day of the month of the resulting #GDateTime is clamped to the number of days in the updated calendar month. For example, if adding 1 month to 31st January 2018, the result would be 28th February 2018. In 2020 (a leap year), the result would be 29th February.
the number of months
Creates a copy of datetime and adds the specified number of years to the
copy. Add negative values to subtract years.
As with g_date_time_add_months(), if the resulting date would be 29th February on a non-leap year, the day will be clamped to 28th February.
the number of years
Creates a newly allocated string representing the requested format.
The format strings understood by this function are a subset of the strftime() format language as specified by C99. The %D, %U and %W conversions are not supported, nor is the 'E' modifier. The GNU extensions %k, %l, %s and %P are supported, however, as are the '0', '_' and '-' modifiers. The Python extension %f is also supported.
In contrast to strftime(), this function always produces a UTF-8 string, regardless of the current locale. Note that the rendering of many formats is locale-dependent and may not match the strftime() output exactly.
The following format specifiers are supported:
%Y-%m-%d (the ISO 8601 date format)Some conversion specifications can be modified by preceding the conversion specifier by one or more modifier characters. The following modifiers are supported for many of the numeric conversions:
Additionally, when O is used with B, b, or h, it produces the alternative form of a month name. The alternative form should be used when the month name is used without a day number (e.g., standalone). It is required in some languages (Baltic, Slavic, Greek, and more) due to their grammatical rules. For other languages there is no difference. %OB is a GNU and BSD strftime() extension expected to be added to the future POSIX specification, %Ob and %Oh are GNU strftime() extensions. Since: 2.56
a valid UTF-8 string, containing the format for the #GDateTime
Format datetime in ISO 8601 format,
including the date, time and time zone, and return that as a UTF-8 encoded
string.
Since GLib 2.66, this will output to sub-second precision if needed.
Retrieves the day of the month represented by datetime in the gregorian
calendar.
Retrieves the ISO 8601 day of the week on which datetime falls (1 is
Monday, 2 is Tuesday... 7 is Sunday).
Retrieves the day of the year represented by datetime in the Gregorian
calendar.
Retrieves the hour of the day represented by datetime
Retrieves the microsecond of the date represented by datetime
Retrieves the minute of the hour represented by datetime
Retrieves the month of the year represented by datetime in the Gregorian
calendar.
Retrieves the second of the minute represented by datetime
Retrieves the number of seconds since the start of the last minute, including the fractional part.
Get the time zone for this datetime.
Determines the time zone abbreviation to be used at the time and in
the time zone of datetime.
For example, in Toronto this is currently "EST" during the winter months and "EDT" during the summer months when daylight savings time is in effect.
Determines the offset to UTC in effect at the time and in the time
zone of datetime.
The offset is the number of microseconds that you add to UTC time to arrive at local time for the time zone (ie: negative numbers for time zones west of GMT, positive numbers for east).
If datetime represents UTC time, then the offset is always zero.
Returns the ISO 8601 week-numbering year in which the week containing
datetime falls.
This function, taken together with g_date_time_get_week_of_year() and
g_date_time_get_day_of_week() can be used to determine the full ISO
week date on which datetime falls.
This is usually equal to the normal Gregorian year (as returned by g_date_time_get_year()), except as detailed below:
For Thursday, the week-numbering year is always equal to the usual calendar year. For other days, the number is such that every day within a complete week (Monday to Sunday) is contained within the same week-numbering year.
For Monday, Tuesday and Wednesday occurring near the end of the year, this may mean that the week-numbering year is one greater than the calendar year (so that these days have the same week-numbering year as the Thursday occurring early in the next year).
For Friday, Saturday and Sunday occurring near the start of the year, this may mean that the week-numbering year is one less than the calendar year (so that these days have the same week-numbering year as the Thursday occurring late in the previous year).
An equivalent description is that the week-numbering year is equal to the calendar year containing the majority of the days in the current week (Monday to Sunday).
Note that January 1 0001 in the proleptic Gregorian calendar is a Monday, so this function never returns 0.
Returns the ISO 8601 week number for the week containing datetime.
The ISO 8601 week number is the same for every day of the week (from
Moday through Sunday). That can produce some unusual results
(described below).
The first week of the year is week 1. This is the week that contains the first Thursday of the year. Equivalently, this is the first week that has more than 4 of its days falling within the calendar year.
The value 0 is never returned by this function. Days contained within a year but occurring before the first ISO 8601 week of that year are considered as being contained in the last week of the previous year. Similarly, the final days of a calendar year may be considered as being part of the first ISO 8601 week of the next year if 4 or more days of that week are contained within the new year.
Retrieves the year represented by datetime in the Gregorian calendar.
Retrieves the Gregorian day, month, and year of a given #GDateTime.
Hashes datetime into a #guint, suitable for use within #GHashTable.
Determines if daylight savings time is in effect at the time and in
the time zone of datetime.
Stores the instant in time that datetime represents into tv.
The time contained in a #GTimeVal is always stored in the form of
seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the time
zone associated with datetime.
On systems where 'long' is 32bit (ie: all 32bit systems and all Windows systems), a #GTimeVal is incapable of storing the entire range of values that #GDateTime is capable of expressing. On those systems, this function returns %FALSE to indicate that the time is out of range.
On systems where 'long' is 64bit, this function never fails.
a #GTimeVal to modify
Create a new #GDateTime corresponding to the same instant in time as
datetime, but in the time zone tz.
This call can fail in the case that the time goes out of bounds. For example, converting 0001-01-01 00:00:00 UTC to a time zone west of Greenwich will fail (due to the year 0 being out of range).
the new #GTimeZone
Gives the Unix time corresponding to datetime, rounding down to the
nearest second.
Unix time is the number of seconds that have elapsed since 1970-01-01
00:00:00 UTC, regardless of the time zone associated with datetime.
Atomically decrements the reference count of datetime by one.
When the reference count reaches zero, the resources allocated by
datetime are freed
Creates a new #GDateTime corresponding to the given date and time in
the time zone tz.
The year must be between 1 and 9999, month between 1 and 12 and day
between 1 and 28, 29, 30 or 31 depending on the month and the year.
hour must be between 0 and 23 and minute must be between 0 and 59.
seconds must be at least 0.0 and must be strictly less than 60.0.
It will be rounded down to the nearest microsecond.
If the given time is not representable in the given time zone (for example, 02:30 on March 14th 2010 in Toronto, due to daylight savings time) then the time will be rounded up to the nearest existing time (in this case, 03:00). If this matters to you then you should verify the return value for containing the same as the numbers you gave.
In the case that the given time is ambiguous in the given time zone (for example, 01:30 on November 7th 2010 in Toronto, due to daylight savings time) then the time falling within standard (ie: non-daylight) time is taken.
It not considered a programmer error for the values to this function to be out of range, but in the case that they are, the function will return %NULL.
You should release the return value by calling g_date_time_unref() when you are done with it.
a #GTimeZone
the year component of the date
the month component of the date
the day component of the date
the hour component of the date
the minute component of the date
the number of seconds past the minute
Creates a #GDateTime corresponding to the given
ISO 8601 formatted string
text. ISO 8601 strings of the form
Note that as #GDateTime "is oblivious to leap seconds", leap seconds information
in an ISO-8601 string will be ignored, so a 23:59:60 time would be parsed as
23:59:59.
YYYY-MM-DD - Year/month/day, e.g. 2016-08-24.YYYYMMDD - Same as above without dividers.YYYY-DDD - Ordinal day where DDD is from 001 to 366, e.g. 2016-237.YYYYDDD - Same as above without dividers.YYYY-Www-D - Week day where ww is from 01 to 52 and D from 1-7,
e.g. 2016-W34-3.YYYYWwwD - Same as above without dividers.hh:mm:ss(.sss) - Hours, minutes, seconds (subseconds), e.g. 22:10:42.123.hhmmss(.sss) - Same as above without dividers.Z - UTC.+hh:mm or -hh:mm - Offset from UTC in hours and minutes, e.g. +12:00.+hh or -hh - Offset from UTC in hours, e.g. +12.If the timezone is not provided in text it must be provided in default_tz
(this field is otherwise ignored).
This call can fail (returning %NULL) if text is not a valid ISO 8601
formatted string.
You should release the return value by calling g_date_time_unref() when you are done with it.
an ISO 8601 formatted time string.
a #GTimeZone to use if the text doesn't contain a timezone, or %NULL.
Creates a #GDateTime corresponding to the given #GTimeVal tv in the
local time zone.
The time contained in a #GTimeVal is always stored in the form of seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the local time offset.
This call can fail (returning %NULL) if tv represents a time outside
of the supported range of #GDateTime.
You should release the return value by calling g_date_time_unref() when you are done with it.
a #GTimeVal
Creates a #GDateTime corresponding to the given #GTimeVal tv in UTC.
The time contained in a #GTimeVal is always stored in the form of seconds elapsed since 1970-01-01 00:00:00 UTC.
This call can fail (returning %NULL) if tv represents a time outside
of the supported range of #GDateTime.
You should release the return value by calling g_date_time_unref() when you are done with it.
a #GTimeVal
Creates a #GDateTime corresponding to the given Unix time t in the
local time zone.
Unix time is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC, regardless of the local time offset.
This call can fail (returning %NULL) if t represents a time outside
of the supported range of #GDateTime.
You should release the return value by calling g_date_time_unref() when you are done with it.
the Unix time
Creates a #GDateTime corresponding to the given Unix time t in UTC.
Unix time is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC.
This call can fail (returning %NULL) if t represents a time outside
of the supported range of #GDateTime.
You should release the return value by calling g_date_time_unref() when you are done with it.
the Unix time
Creates a new #GDateTime corresponding to the given date and time in the local time zone.
This call is equivalent to calling g_date_time_new() with the time zone returned by g_time_zone_new_local().
the year component of the date
the month component of the date
the day component of the date
the hour component of the date
the minute component of the date
the number of seconds past the minute
Creates a #GDateTime corresponding to this exact instant in the given
time zone tz. The time is as accurate as the system allows, to a
maximum accuracy of 1 microsecond.
This function will always succeed unless GLib is still being used after the year 9999.
You should release the return value by calling g_date_time_unref() when you are done with it.
a #GTimeZone
Creates a new #GDateTime corresponding to the given date and time in UTC.
This call is equivalent to calling g_date_time_new() with the time zone returned by g_time_zone_new_utc().
the year component of the date
the month component of the date
the day component of the date
the hour component of the date
the minute component of the date
the number of seconds past the minute
An opaque structure that represents a date and time, including a time zone.