Questions related to different times of day as they apply to Jewish Law.

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4
votes
0answers
125 views

On a boat in the Arctic Circle [closed]

I and my wife will be spending Shabbat Hagadol (this year the 31st of March) on a ship. The evening before the ship will be leaving one of the more northern ports of Norway, and navigating through ...
12
votes
2answers
856 views

40 minutes offset for candle lighting?

Several Zmanim apps are giving a choice on my "candle lighting offset". The default here is 40 minutes instead of the usual 18 minutes I've heard. Why 40? Why do I even have a choice? Does the fact ...
3
votes
0answers
60 views

When is the earliest time one can pray in the morning? [duplicate]

Possible Duplicate: Davening Shacharis? When is the earliest time one can pray (the Shemone Esre) in the morning? Reciting Keriath Shema' has its own rules, and I understand you may need ...
7
votes
1answer
159 views

Does praying at the wrong time count for anything?

(This question might be a prerequisite to be able to answer this question.) Does praying at the wrong time count for anything? What does it accomplish? Sources, please.
3
votes
1answer
225 views

Variant on: Is it better to Daven “too early” with a Minyan, or to Daven alone at the right time?

In many communities there is a regular weekday morning Minyan and the "working-person's" Minyan, which technically Davens too early according to most opinions, but which is better than nothing, ...
2
votes
3answers
257 views

Precise Zemanim?

This site (see the paragraph starting with "accuracy") says that no one can predict the times for sunrise and sunset to within a minute accurately for a given location because of certain atmospheric ...
3
votes
1answer
238 views

Mincha started before sheki'a, extended beyond it. What about davenning maariv straight after mincha?

A minyan starts to daven mincha before sheki’a with the intention to daven maariv after sheki’a. In the event, mincha extends beyond shki’a. There are IMHO three possible cases: They start but do ...
7
votes
2answers
1k views

Until what time in the morning may you eat on a fast day?

On fast days that begin in the morning, (Asara B'Teves, Taanis Esther, Shiva Asar B'Tamuz, Tzom Gedalya) if you intend to eat when you awake, until what time may you eat in the morning? Does it depend ...
14
votes
4answers
2k views

Fast days and time zones

If I fly westward on a fast day, and travel through one/several time zone/s, thereby going back in (clock) time, must I then fast until it ends in my current time zone? What if I fly eastward, thereby ...
3
votes
2answers
200 views

Marriv before/after lighting the Menorah

Does one need to Daven Marriv before lighting the Chanukah Menorah or can you light before davening? Why?
5
votes
3answers
388 views

If it's your minhag to daven Hanetz, do you do so even without a minyan?

A friend once told me that if one's minhag is to daven with Hanetz (i.e., starting the Amida prayer at sunrise), and if there's no Hanetz minyan nearby, you should still daven Hanetz, even without a ...
8
votes
2answers
599 views

Magen Avraham - Practically no Plag HaMinḥah or just no Plag HaMinḥah in winter?

Calling all science and math-oriented Judaism.SE-ers! According to the website MyZmanim.com, today's Halachic times where I work are as follows (only a handful of times are shown because the question ...
6
votes
1answer
132 views

Chanuka lighting: BeZman (at the best time) or Pirsumei Nissa (publicization of the miracle)?

Is it better to light candles at bezman, or later when there will be more pirsumei nissa? I find 4:30 (approx candlelighting time in NYC this year) to be too early to catch the regular "rush hour." Is ...
5
votes
1answer
127 views

What is “חצות האמצעי”?

While researching an answer to this question I stumbled across the term "חצות האמצעי". What does it mean? Does it refer to halachic midday, i.e. halfway between netz hachama and shkias hachama, or ...
11
votes
1answer
543 views

Kiddush between 6 and 7 o'clock - Which clock?

Many people hold that one should not make kiddush on Shabbos between the hours of 6 and 7. (Sources: Shulchan Aruch Harav and Taamei Haminhagim, (who, in turn, bring a Maharil, a Magen Avraham, and a ...
11
votes
3answers
257 views

Who distributed the zemiros across the three meals?

Any book of zemiros whether it's a siddur, birchon, or what have you divides the zemiros between the three meals. Sometimes the rationale is obvious as with the tikkunim which are written for each ...
4
votes
1answer
258 views

Why daven ke-vasikin on Hoshana Rabbah?

I know that some people specifically daven ke-vasikin on Hoshana Rabbah. Is this only because they stayed awake all night and thus want to daven as early as possible, or is there a more direct and ...
8
votes
3answers
295 views

Earliest time to make an Eiruv Tavshilin

When's the earliest time one can make an Eiruv Tavshilin on erev yom tov?
3
votes
1answer
84 views

Optimal time for sleichos

What is the optimal time for the recitation of, nay the asking for, Sleichos? Please state whose opinion you are following or stating in your answer.
9
votes
2answers
401 views

Polyphasic Sleep and Halacha

I recently read an article on polyphasic sleep and I'm quite interested in experimenting with it. The article advises the Uberman approach which advocates 20-30 minute naps every four hours, meaning ...
2
votes
1answer
560 views

Does one make Birkas Hatorah/Hashachar before alos hashachar?

As per this question, it seems apparent that one doesn't make the morning blessings until at least alos hashachar. However, in Rabbi Avraham Greenbaum's book "The Sweetest Hour: Tikkun Chatzot," on ...
5
votes
2answers
855 views

How is Chatzos Halayla (Halachic Midnight) calculated?

It seems pretty easy to calculate from the get-go that the formula is something like this: # a halachic hour is one twelfth of the time between sunrise and sunset halachicHour = (timeOfSunset - ...
9
votes
3answers
346 views

Eating before davening Shacharis

Are there any accepted authorities of Halacha that permit a man to eat (i.e., "real" eating such as consuming cake or cereal) before davening Shacharis under "normal circumstances" (i.e., a healthy ...
3
votes
3answers
228 views

Why do we call it “candle-lighting” time?

Since it is still permissible to do melacha (work forbidden on shabbat) including lighting shabbat candles until shki'a (sunset), which is 18 minutes (or 40 minutes in Jerusalem) following ...
1
vote
1answer
3k views

What is the earliest time to daven maariv during the week? [duplicate]

Possible Duplicate: When is the earliest time you can daven ma'ariv during the week? On Shabbos one could accept Shabbos early and thereby daven Maariv early. During the week, when ...
6
votes
4answers
89 views

When can Melavah Malkah be eaten until?

When is the last time one can eat a meal on Motzei Shabbos and still have it considered Melavah Malkah? When is the deadline?
6
votes
2answers
211 views

Tachanun for Shacharis in the afternoon, on a day where there is no Tachanun at Mincha

If you start Shacharis Shmonei Esrei just before Chatzos, on a day where there is no Tachanun said at Mincha, and finished after Chatzos, do you say Tachanun?
12
votes
3answers
681 views

When does somebody living in space (e.g. ISS) observe Shabbat?

I understand that Jewish astronauts have been advised to observe Shabbat by Cape Canaveral time, by analogy with traveling to a place that doesn't have daily sunrise/sunset where some rule you use the ...
3
votes
2answers
476 views

Davening Maariv at Shekiya / or after Plag HaMincha - repeating Kriyas Shema

If a person prays Maariv after Plag HaMincha prior to Shekiya is there any Halachic authority that holds he is Yotzei the Mitzva of Kriyas Shema and does not have to repeat it? What if he prays right ...
4
votes
2answers
451 views

Can one follow Rabbeinu Tam time for beginning Shabbos?

Does anyone today follow Rabbineu Tam time for the beginning of Shabbos? Reading some tshuvas (e.g. Eretz haTzvi) it is clear this was widespread in Europe. If one has previously been accustomed to ...
4
votes
1answer
214 views

Alos Hashachar on a flight from Israel to Toronto

What time will a person cross alos hashachar (first light of the sun) if he is flying from Israel to Toronto on the night of the fast of the 17th of Tammuz? The flight leaves Israel at one in the ...
6
votes
1answer
303 views

Shabbat in the arctic

If I were to travel to Barrow, Alaska in the summer, when there is no sunset, when should I light the Shabbat candles? (This is not a hypothetical question; I work remotely for an Alaskan corporation ...
9
votes
2answers
265 views

Davening early Maariv first night of Shavuos

I have always heard that on the first night of Shavuos you should wait till Tzais HaKochavim for Maariv in order to have Temimos - 7 complete weeks of Sefira. Recently I heard that Harav Ovadia Yosef ...
8
votes
1answer
511 views

When praying alone, can one say Ma'ariv/Arvit before shkia (sunset)?

I have heard in the past that one praying alone may not say Ma'ariv/Arvit until shkia/sunset but that one praying with a minyan can start Ma'ariv as early as Plag HaMincha. Could someone provide me a ...
11
votes
1answer
320 views

When does a day start/end in the far North/South?

As I understand it, a day in the Jewish calendar is from sunset to sunset. How is this handled if you are living so far north or south that you have long periods of daylight or darkness?
4
votes
1answer
116 views

Mincha before lunch on the 8th day of Pesach (Chabad)

The Luach Kolel Chabad says it's customary to pray mincha before lunch on the eighth day of Pesach. Why?
2
votes
1answer
708 views

Early maariv on 2nd day Yom Tov

A shul in my city made an early maariv for the 2nd day of yom tov. Knowing who the Rabbi is, he did not do this out of ignorance. There are 2 issues I am unclear about: Are there contemporary ...
2
votes
1answer
627 views

Sefiras HaOmer - earliest time to count

According to Halacha what is the earliest time can you say Sefiras HaOmer each night and be Yotzei?
3
votes
1answer
555 views

Optimal time for Meal on Purim

What is the optimal time for the Purim Seduah (Meal)?
1
vote
1answer
80 views

Time for Reading the Meggilah

What is the optimal time for reading the Meggilah By day? By night? When is the first and last halachicly acceptable time for each?
2
votes
1answer
411 views

What is Neitz and why is it important

What is Neitz and why is it important? My inspiration: http://mekubal.wordpress.com/2011/03/14/at-long-last/#comments
5
votes
0answers
135 views

Is mincha gedolah better [duplicate]

Possible Duplicate: Timing of Mincha Why do people wait to daven mincha later and not daven mincha gedolah?
4
votes
2answers
213 views

Shachris in the Dark

When do people who live in places where it is dark for days Daven Shachris and put on Tefillin? Please provide a source (Mareh Makom).
8
votes
2answers
2k views

Davening on Plane Zmanim

How do you know when to daven Shachris on a plane?
4
votes
3answers
72 views

12 hours to the day, 12 hours to the night

Why is a day and night divided into 12 hours? Why not 10 hours? What is the significance of 12?
4
votes
3answers
172 views

Preferable time to light Chanukah Menorah

What is the preferable time to light the Chanukah Menorah: after dark or before?
13
votes
7answers
232 views

Zmanim accuracy before digital clocks?

How was time measured for the purpose of Zmanim before we had accurate clocks like we do today? Was it possible to accurately determine Chatzos (at night) or the different watches of the night? I know ...
4
votes
1answer
613 views

Calculating shabbat candle lighting time

Is it possible to calculate the candle lighting time based on location and date alone? Assume all you have is a GPS, a watch and a calculator.
8
votes
3answers
329 views

Hours, minutes, and chalakim

On Shabbat preceding Rosh Chodesh, the time of the molad is generally announced in units of hours, minutes, and chalakim. However, minutes are not a traditional Jewish unit of time; rather hours are ...
3
votes
2answers
198 views

Are there different shitos for when fasts end? What are they?

Are there different shitos for when fasts end? (Similar Motzei Shabbos, when some people wait 72 minutes past shkiya to do melacha, where other people wait less.)