datetimeutils – Utilities for Dates and Times

0.1-0

Wed, 9 Dec 2015 00:00:00 +0100

there is now a public Git repository at https://github.com/enricoschumann/datetimeutils

0.1-2

Fri, 29 Apr 2016 00:00:00 +0200

new function 'firstOfYear'

0.1-3

Wed, 11 May 2016 00:00:00 +0200

new function 'convertTZ'

0.1-4

Thu, 7 Jul 2016 00:00:00 +0200

fixed: 'nthWeekday' had failed in some cases
new function 'isBusinessDay'

0.1-5

Tue, 4 Oct 2016 00:00:00 +0200

add short-hands 'prevBDay' and 'nextBDay' for 'previousBusinessDay' and 'nextBusinessDay'

0.2-0

Mon, 8 May 2017 00:00:00 +0200

*backward* *incompatible* *changes*. for better consistency, several functions have been renamed: convertDate => convert_date convertTZ => convert_tz dayOfMonth => "day_of_month<-" dayOfMonth => day_of_month endOfMonth => end_of_month endOfPreviousMonth => end_of_previous_month endOfYear => end_of_year firstOfMonth => first_of_month firstOfYear => first_of_year isBusinessDay => is_businessday isLeapyear => is_leapyear isWeekend => is_weekend lastWeekday => last_weekday nextBDay => next_bday nextBusinessDay => next_businessday nthWeekday => nth_weekday prevBDay => prev_bday previousBusinessDay => previous_businessday

0.2-1

Mon, 26 Jun 2017 00:00:00 +0200

fixed: 'timegrid' had ignored the 'excludeWeekends' argument

0.2-10

Fri, 26 Jan 2018 00:00:00 +0100

nth_day: argument 'period' may be numeric

0.2-11

Mon, 5 Feb 2018 00:00:00 +0100

timegrid: argument 'excludeWeekends' was renamed to 'exclude.weekends' (for consistency with other functions, such as PMwR::plot_trading_hours)
nth_day: argument 'period' may now also be "week" or "year"; argument 'n' may now also be numeric

0.2-12

Wed, 28 Feb 2018 00:00:00 +0100

nth_day: argument 'n' may be of length greater than 1

0.2-2

Mon, 26 Jun 2017 00:00:00 +0200

fixed: 'timegrid' had failed when timezone was missing

0.2-3

Sun, 9 Jul 2017 00:00:00 +0200

new function 'guess_datetime'

0.2-4

Sun, 9 Jul 2017 00:00:00 +0200

update documentation + internal changes

0.2-5

Mon, 7 Aug 2017 00:00:00 +0200

add vignette with examples

0.2-6

Thu, 17 Aug 2017 00:00:00 +0200

new function 'end_of_previous_year'
fixed: the 'shift' argument in 'end_of_year' had been applied to months instead of years

0.2-7

Fri, 25 Aug 2017 00:00:00 +0200

'last_weekday' now supports arguments 'before' and 'inclusive'

0.2-8

Wed, 11 Oct 2017 00:00:00 +0200

minor change in example for 'timegrid' to avoid error on Solaris

0.2-9

Fri, 5 Jan 2018 00:00:00 +0100

new functions 'year', 'month' and 'nth_day'

0.3-0

Thu, 21 Mar 2019 00:00:00 +0100

new function 'end_of_quarter'
nth_day: argument 'period' may now also be a month name. Arguments 'timestamps', 'start' and 'end' may be simple years, such as "2000". For start/end, they will be interpreted as 1 Jan/31 Dec of that year.

0.4-0

Wed, 25 Mar 2020 00:00:00 +0100

guess_datetime: the function now supports the date pattern "YYYYMMDD"; it also gains arguments 'date.only', 'within' and 'tz'
the package now contains vectors 'month.name.de' and 'month.abb.de.din1355.1', which provide German month names and their abbreviations
the package now contains a data.frame 'tznames', which provides a mapping between Olson and Windows timezone names

0.5-0

Thu, 1 Apr 2021 00:00:00 +0200

fixed: argument 'tz' had been ignored by 'guess_datetime'
'guess_datetime' gets an argument 'try.patterns' that lets the user specify additionals patterns
new functions 'hour' 'minute', and 'second', which work just as 'year' etc.
convert_date: support for PSPP/SPSS dates and times; based on a patch by J\"org Beyer
'tznames' has been updated and no longer contains duplicates

0.6-0

Sat, 1 Apr 2023 00:00:00 +0200

fixed: functions 'hour' 'minute', and 'second', which had been added in v0.5-0, are now exported
patterns for days in 'guess_datetime' are relaxed: in some cases a single digit will be recognised
'previous_businessday', 'next_businessday' and 'is_businessday' now take into account a vector of 'holidays' when computing dates
'convert_date' gains a new type "excel1904" for Excel files that use origin 1904-01-01. A new function 'date1904' determines if an xlsx-file uses origin 1904.
tz data have been updated

0.6-1

Mon, 3 Apr 2023 00:00:00 +0200

no user-visible changes (fixed some timezone issues in tests)

0.6-2

Wed, 20 Sep 2023 00:00:00 +0200

tiny updates in vignette
there is an additional public Git repository at https://git.sr.ht/~enricoschumann/datetimeutils

0.6-3

Thu, 2 Nov 2023 00:00:00 +0100

fix functions 'hour', 'minute' and 'second', which had been broken

0.6-4

Mon, 1 Apr 2024 00:00:00 +0200

tz data have been updated

0.6-5

Tue, 1 Apr 2025 00:00:00 +0200

tz data have been updated
a vector 'Easter' is now exported, which provides Easter sundays (in the Gregorian calendar) between 1970--2029

0.6-6

Sun, 14 Dec 2025 00:00:00 +0100

tz data have been updated (added 'America/Coyhaique')
small fix in vignette