hdate man page (v1.6)

Boruch Baum

hdate man page (v1.6)

hdate(1)                           libhdate                           hdate(1)

       hdate  -  displays Hebrew date information for a given Gregorian/Julian

       hdate [options] [coordinates [timezone]] [[[dd] mm] yyyy]

       hdate [options] [coordinates [timezone]] [ julian_day ]

       coordinates: -l [NS]yy[.yyy] -L [EW]xx[.xxx]
                    -l [NS]yy[:mm[:ss]] -L [EW]xx[:mm[:ss]]
       timezone:    -z nn[( .nn | :mm )]

       hdate translates the specified date to the Hebrew calendar and  option‐
       ally  displays  further  information  about that Hebrew date, including
       holidays and astronomical-related times (see section LOCATION,  below).
       If  no  arguments  are  given,  it displays information for the current
       date. If a single numeric argument is given, it will be interpreted  as
       a year, and hdate will output the requested information for all days of
       that year. If two numeric arguments are given, it will  be  interpreted
       as  mm  yyyy,  and  hdate will output the requested information for all
       days of that month.

       INPUTTING A HEBREW DATE: If the year provided  is  greater  than  3000,
       hdate  will interpret the given date as a Hebrew date, and will display
       information for the corresponding Gregorian  date.  Hebrew  months  are
       expected  to  be  passed as numbers 1-12 for Tishrei - Elul; Adar I and
       Adar II are expected to be passed as months 13 and 14.

       INPUTTING A JULIAN DAY: If a single numeric argument is  provided,  and
       it  is  greater than 348021, hdate will interpret it as the "Julian day
       number" and will display information for the corresponding Hebrew date.

       -b --bidi         output Hebrew information in Hebrew, but in reverse
          --visual       sequence.

       -c                print Shabbat start/end times. Shabbat starts 20  min
                         before sunset, and ends when three stars are out.

       -d --diaspora     use diaspora reading and holidays.

       -h --holidays     print holidays.

       -H                Print only if it is a holiday.

       -i --ical         use iCal formatted output.

       -j --julian       print Julian day number.

       -o --omer         print Sefirat Ha Omer

       -q --quiet-alerts quiet. suppress warning messages

       -r --parasha      print weekly reading for Shabbat.

       -R                print  only  if  the  weekly  reading is read on that

       -s --sun          print sunrise/sunset times.

       -S --short-format print using short format.

       -t                print day times: first  light,  talit,  sunrise,  mid
                         day, sunset, first stars, three stars

       -T --table        print tabular output. All data for each requested day
                         will be output  on  a  single  comma-delimited  line.
                         Most  suitable  for  piping,  or  export  to  spread‐
                         sheets0TP -l --latitude [NS]yy[.yyy] decimal degrees,
                         or  [NS]yy[:mm[:ss]] degrees, minutes, seconds. Nega‐
                         tive values are South

       -L --longitude    [EW]xx[.xxx]  decimal  degrees,  or  [EW]xx[:mm[:ss]]
                         degrees, minutes, seconds. Negative values are West

       -z --timezone     +/-UTC. Notation may  be in decimal hours ( hh[.hh] )
                         or hours, minutes ( hh[:mm] )

          --hebrew       forces Hebrew to print in Hebrew characters

          --yom          force Hebrew prefix to Hebrew day of week

          --leshabbat    insert parasha between day of week and day

          --leseder      insert parasha between day of week and day

                         don't display next day if after sunset

       If you want hdate to display accurate  time-of-day  information,  hdate
       requires location and time zone information in order to make astronomi‐
       cal calculations for a given date. If you don't provide ANY such infor‐
       mation,  hdate  uses  your computer's local time zone information as an
       indicator, and either picks a city in that time zone,  or  defaults  to
       the  equator  at  the  center  of  that  time zone. If hdate can't even
       retrieve time zone information from your computer, it defaults to  Tel-
       Aviv.  For  other locations, use the -l -L option pair. For other time‐
       zones, use the -z option. Co-ordinates and standard time zones for some
       common locations are listed below.

       The current defaults include:
                Timezone   Default city    Lattitude  Longitude
                   -5      New York City      40        -74
                    0      London             51          0
                    1      Paris              48          2
                    2      Tel-Aviv           32         34
                    3      Moscow             55         37

       Useful locations and time zones
             Jerusalem   31, 35, 2      Buenos Aires 34,  -58, -3
             Tel Aviv    32, 34, 2      Hong Kong    22,  114,  8
             Haifa       32, 34, 2      Los Angeles  34, -118, -8
             Beer Sheva  31, 34, 2      Sao Paolo    23, -46,  -3
             Ashdod      31, 34, 2      Toronto      43, -79   -5
             Tiberias    32, 35, 2
             Eilat       29, 34, 2

       This  folder  and  file will be automatically created, and includes its
       own documentation, in-line:

       If ${XDG_CONFIG_HOME} is undefined:

       Accuracy  The accuracy of the astronomically-derived data  will  suffer
                 from not accounting for environmental conditions such as ele‐
                 vation, horizon, temperature and air pressure.

       Timezones The timezone support is currenlty primitive and lacks support
                 for daylight savings time transitions.

                 The software does not yet account for the phenomenon and com‐
                 plications of the  "Gregorian  transition"  from  the  prior,
                 Julian  calendar,  which  effectively caused an instantaneous
                 'loss' of two weeks for all gentiles affected. Countries (eg.
                 Poland,  Spain and Italy) began adopting the Gregorian calen‐
                 dar on 8 Tishrei 5343 (4 October 1582CE), although  many  did
                 not  transition  until  the  56th  century  (1752  CE, eg. UK
                 colonies, Sweden). Russia did not adopt the Gregorian  calen‐
                 dar  until  5678  (1918  CE)  and  Turkey  did not until 5687
                 (December, 1926 CE). Many other countries made the transition
                 on  other  dates.  Keep  in  mind that Russia invaded part of
                 Poland, undoing, for the interim,  the  Gregorian  transition
                 for (only) that part of Poland; Also important to remember in
                 this regard is that Eretz Ysroel  was  part  of  the  Turkish
                 Ottoman  empire  until  the  British mandate (5677 (1917CE)).
                 Until all this is accounted for adequately by  this  applica‐
                 tion, refer to ' ncal -p ´ for a basic table of country tran‐
                 sitions. However, keep in mind that European  borders  under‐
                 went  many  changes  during the 426 years in question, so the
                 accuracy of your data will depend on  accurate  knowledge  of
                 whether  any  particular  date  at  any specific location was
                 Julian or Gregorian.

       1. Create an iCal calendar of the holidays of year 2025.
             hdate -Hi 2025

       2. Print out the weekly readings and sunset/sunrise times for Eilat, on
          April 2031.
             hdate -sR 4 2031 -l29 -L34 -z2

       mlterm(1), hcal(1), hebcal(1), date(1), ncal(1), cal(1), remind(1)

       Boruch Baum 2011-2012. Yaacov Zamir 2005-2010.

       project page: http://libhdate.sourceforge.net

       hcal and hdate are part of the package libhdate , a small C/C++ library
       for Hebrew dates, holidays, and reading sequences (parashiot). It  uses
       the  source  code  from  Amos  Shapir's  "hdate"  package, as fixed and
       patched by Nadav Har'El. The Torah reading sequence  tables  were  con‐
       tributed by Zvi Har'El.

Linux                             2012-01-01                          hdate(1)

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