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ipraytime - Online in the Cloud

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PROGRAM:

NAME


ipraytime - An Islamic Prayer Times Calculator

SYNOPSIS


ipraytime [--date yyyymmdd] [--latitude real_num] [--longitude real_num] [--utcdiff
real_num] [--method int_num] [--ishaangle real_num] [--fajrangle real_num] [--dst int_num]
[--dst-start yyyymmdd] [--dst-end yyyymmdd] [--round int_num] [--extreme int_num]
[--sea-level int_num] [--month [int_num]] [--year [int_num]] [--file pref_file] [--end]
[--brief] [--help]

DESCRIPTION


The ipraytime program is a generator of Islamic prayer time schedules for any given
location. ipraytime also calculates the appropriate Qibla direction (heading towards the
Kabaa) based on the given location. ipraytime in its single day format is also capable of
calculating Imsaak times (ie. the times when one is to start fasting). ipraytime is also
capable of generating a schedule for an entire month or year based on command-line
arguments. The program is also able to print the schedules for the rest of the current
month so as to skip days that have already passed. ipraytime also has a minimalistic
option to simply show a one liner of the prayer times in its single day format.

ipraytime has multiple ways of conveying info and settings to it. The order of precedence
(from highest to lowest) is, the command-line followed by the environment variable setting
(IPT_DATA) to the data being presented in ipraytime's RC file (~/.iprayrc) in one's home
directory. If none of the above is found, ipraytime defaults to using Makkah's location
with the host machine's current date settings.

OPTIONS


ipraytime follows the usual GNU command line syntax, with long options starting with two
dashes (`-'). A summary of all options is noted below:

-h, --help
Show summary of options

-d, --date yyyymmdd
Specify the Gregorian date to use where `y' stands for year, `m' for month and `d'
for day

-lat, --latitude real_num
Specify the latitude setting to use during calculations. The value could be any
real number

-lon, --longitude real_num
Specify the longitude setting to use during calculations. The value could be any
real number

-sea, --sea-level real_num
Specify height above Sea level (in meters)

-u, --utcdiff real_num
Specify the difference between the specified timezone and that of GMT/UTC. The
value could be any real number

-a, --anglemethod [int_num]
Specify which angle method calculation to use. The angle methods that are
currently supported by ipraytime are,

1 Egyptian General Authority of Survey
Fajr/Isha Angle : 20/18
Used in : Africa, Indonesia, Iraq,
Jordan, Lebanon, Malaysia,
Singapore, Syria,
Parts of the USA

2 University of Islamic Sciences, Karachi (Shaf'i)
Fajr/Isha Angle : 18/18
Used in : Iran, Kuwait,
Parts of Europe

3 University of Islamic Sciences, Karachi (Hanafi)
Fajr/Isha Angle : 18/18
Used in : Afghanistan, Bangladesh,
India

4 Islamic Society of North America
Fajr/Isha Angle : 15/15
Used in : Canada, Parts of UK,
Parts of USA

5 Muslim World League (MWL)
Fajr/Isha Angle : 18/17
Used in : Parts of Europe,
Far East, Parts of USA

6 Umm Al-Qurra University
Fajr/Isha Angl e : 19/0
Isha Interval : 90 minutes from Al-Maghrib
prayer but set to 120
during Ramadan.
Used in : Saudi Arabia

7 Fixed Isha Angle Interval (always 90)
Fajr/Isha Angle : 19.5/0
Isha Interval : 90 minutes from Al-Maghrib
prayer
Used in : Bahrain, Oman, Qatar, UAE

8 Egyptian General Authority of Survey (Egypt)
Fajr/Isha Angle : 19.5/17.5
Used in : Egypt

-fa, --fajrangle [real_num]
Specify which angle to use for Fajr. Will override the one set by the
--anglemethod.

-ia, --ishaangle [real_num]
Specify which angle to use for Isha. Will override the one set by the
--anglemethod.

-s, --dst [int_num]
By default, ipraytime uses the host's machine timezone information to determine
whether daylight saving time is in effect or not. If this information is
unavailable or not accurate, this option provides the means to explicitly set the
DST status. Set this to 0 to completely disable daylight saving time. Set it to 1
to always add one hour to the computed prayer times.

-ss, --dst-start yyyymmdd
-se, --dst-end yyyymmdd
Specify a range of dates where day light saving time is in effect for your
location. For example:

ipraytime --dst-start 20040328 --dst-end 20041029

-m, --month [int_num]
Specify to print either current month's schedule or the passed-in value's month
schedule.

-y, --year [int_num]
Specify to print either current year's schedule or the passed-in value's year
schedule.

-f, --file pref_file
Specify filename to load which contains user's settings and preferences.

-e, --end
Specify to continue with schedule printing until the end of specified month.

-b, --brief
Specify to print a brief one-liner output for single day mode.

-h12, --regular-hour
Display the prayer times in regular time instead of military time.

-r, --round [int_num]
Specify a method for rounding seconds. The supported methods are,

0 No Rounding. Completely ignore the computed seconds value.

1 Regular Rounding. If seconds are equal to 30 or above, add 1 minute.

2 Special Rounding. Similar to regular rounding but we always round down for
Shurooq and Imsaak times. (This is the default method)

3 Aggressive Rounding. Similar to Special Rounding but we add 1 minute if the
seconds value are equal to 1 second or more.

-x, --extreme [int_num]
Specify a method for prayer times calculations at high (49+) or extreme (66+)
latitudes. Prayer times calculations relies heavily on astronomical events. At
these latitudes some of those events do not occur at all, or are impossible to
precisely calculate using conventional means. For example, at certain locations the
sun never moves below the horizon to the position of the amount of Fajr angle
degrees specified, therefore there will be no real Fajr time at that location. The
supported extreme methods are:

Note: Methods that have the If Invalid keyword are applied only when ipraytime is
unable to calculate these times. Methods that have the Always keyword are applied
always.

0 None. If unable to calculate, leave as 99:99

1 Nearest Latitude (Aqrab Al-Bilaad): All prayers [Always]

2 Nearest Latitude (Aqrab Al-Bilaad): Fajr and Isha [Always]

3 Nearest Latitude (Aqrab Al-Bilaad): All prayers [If Invalid]

4 Nearest Good Day (Aqrab Al-Ayyam): All prayers [Always]

5 Nearest Good Day (Aqrab Al-Ayyam): All prayers [If Invalid] (This is the
default method)

Note: All the extreme methods following below do not have a proof in traditional
Shari'a (Fiqh) resources. These methods were introduced by modern day Muslim
scholars and scientists for practical reasons only.

6 Seventh of Night: Fajr and Isha [Always]

7 Seventh of Night: Fajr and Isha [If Invalid]

8 Seventh of Day: Fajr and Isha [Always]

9 Seventh of Day: Fajr and Isha [If Invalid]

10 Half of the Night: Fajr and Isha [Always]

11 Half of the Night: Fajr and Isha [If Invalid]

Note: To use the next two methods, you will need to specify FajrInterval and
IshaInterval in your configuration file.

12 Minutes from Shorooq/Maghrib: Fajr and Isha [Always]

13 Minutes from Shorooq/Maghrib: Fajr and Isha [If invalid]

CONFIGURATION


ipraytime is capable of loading settings from a configuration file (~/.iprayrc). The
default location of the configuration file can be changed using the --file option. The
content of the file should be in the following syntax, `variable_string: value'. See the
EXAMPLES section for usage examples. Below is a list of all supported settings which can
be used in the configuration file:

Location Settings
City
Specifies an informational city name string to be displayed for reference

Latitude
Specify the latitude setting to use during calculations. The value could be any real
number

Longitude
Specify the longitude setting to use during calculations. The value could be any real
number

UTC
Specify the difference between the specified timezone and that of GMT/UTC. The value
could be any real number

SeaLevel
Specify height above Sea level (in meters)

Pressure
Specify the atmospheric pressure in millibars. The default value is 1010.

Temperature
Specify the temperature in Celsius degree. The default value is 10.

Calculation Method Settings
AngleMethod
Specify which angle method calculation to use. The value needs to be a positive integer
of one of the supported methods. See the --anglemethod option for more information.

Mathhab
Specify which mathhab to use in one's calculations. The current supported value are 1
for Shaf'i and 2 for Hanafi

OffsetList
Specify a list of values in minutes to add or subtract any amount of minutes from the
daily computed prayer times. For example, If you want to add 30 seconds to Maghrib and
subtract 2 minutes from Isha, you will set this option to `0 0 0 0 0.5 -2'.

FajrAngle
Specify the fajr angle to use during calculations. Will override the values of the
specified method.

IshaAngle
Specify the isha angle to use during calculations. Will override the values of the
specified method.

ImsaakAngle
Specify imsaak and fajr angle difference. The default value is 1.5 degrees.

FajrInterval
Specify the number of minutes between fajr and shorooq. This should be a positive
integer.

IshaInterval
Specify the number of minutes between Isha and Maghrib. This should be a positive
integer.

ImsaakInterval
Specify a difference in minutes between imsaak and fajr. The default Imsaak interval
from fajr is 10 minutes if the FajrInterval is set.

ExtremeMethod
Specify which method to use for high and extreme latitudes. The value needs to be an
integer of one of the supported extreme methods. See descriptions of the --extreme
option for a list of the supported methods.

NearestLatitude
Specify the latitude Used for the `Nearest Latitude' extreme methods. The default is at
48.5 degrees.

RoundMethod
Specify which method to use for rounding seconds. The value needs to be an integer of
one of the supported rounding methods. See the --round option for a list of the
supported methods.

Daylight Saving Time Settings
DST
Specify the current DST status. Set this to 0 to completely disable daylight saving
time. Or set it to 1 to always add one hour to the computed prayer times. See the --dst
option for more information.

DST-Start
Specify the start date when daylight saving time adjustment is in effect for your
location. This value should be a valid date in yyyymmdd form

DST-End
Specify the date when daylight saving time adjustment period ends. This value should be
a valid date in yyyymmdd form

Display Settings
HourFormat
Specify a time format for displaying the prayer times. The value should be 12 (regular
time) or 24 (military time)

ENVIRONMENT


IPT_DATA One means to pass-in the various required settings is via this variable. The
format of the variable needs to be "LocationName Latitude Longitude UTCdiff
AngleMethodNumber". For instance,
setenv IPT_DATA "Dubai 25.25 55.3 4 2"

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