Questions related to different times of day as they apply to Jewish Law.
4
votes
1answer
162 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 ...
6
votes
2answers
117 views
Earliest time to make an Eiruv Tavshilin
When's the earliest time one can make an Eiruv Tavshilin on erev yom tov?
2
votes
1answer
60 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.
8
votes
2answers
252 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
238 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
350 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 - ...
8
votes
3answers
179 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
172 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
998 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 ...
4
votes
2answers
63 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?
4
votes
2answers
117 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?
10
votes
3answers
324 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
261 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
257 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
177 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 ...
5
votes
1answer
190 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 ...
8
votes
2answers
171 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 ...
7
votes
1answer
271 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 ...
10
votes
1answer
231 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
99 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
371 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
320 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
130 views
1
vote
1answer
62 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
275 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
133 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
181 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
1answer
2k views
3
votes
3answers
51 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?
3
votes
2answers
84 views
Preferable time to light Chanukah Menorah
What is the preferable time to light before Marriv or after and after dark or before?
11
votes
7answers
200 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
3answers
388 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.
7
votes
3answers
159 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 ...
2
votes
2answers
96 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.)
7
votes
3answers
3k views
What is the earliest time one can daven Shacharis?
When is the earliest time you can Daven Shacharis?
2
votes
1answer
989 views
When is the earliest time you can daven ma'ariv during the week?
When is the earliest time you can Daven Maariv during the week?
6
votes
1answer
138 views
Why does it get darker in Israel quicker?
Why is it that it gets darker in Eretz Yisroel quicker than in the USA, making for a shorter Ben Hash'moshos?
3
votes
5answers
417 views
Priorities: Mincha Ketana vs Mincha Gedola
Which timing of mincha is more important: mincha gedolah or mincha ketana? Why?
5
votes
1answer
170 views
Can I say kiddush levana during daylight hours if the moon is visible?
Suppose it's late afternoon or early morning and the moon is visible -- can I say it then? Or must it be at "night"? (If so, how do we define "night"?)
9
votes
2answers
248 views
Latest shabbat not longest day…?
I was under the impression that the longest day was June 22nd, and yet, year after year- the latest time for candle lighting takes place about a week and a half after that. Intuitively, the latest ...
4
votes
1answer
95 views
Shabbos and Later Davening (Prayer)
Why on Shabbos do most people daven (pray) later than usual? (I seek an halachic answer.)
2
votes
1answer
97 views
Food on crock-pot done by when, when making shabbos early?
Normally, let's say I make shabbos at the usual time, shortly before sunset. If I want to leave food in the crockpot, I want to make sure it's cooked by sunset.
Now what happens if I make Shabbos ...
6
votes
1answer
82 views
Candle Lighting Time: Why Then?
Why 18 minutes (or other minhagim). Where did these numbers come from?
4
votes
1answer
195 views
Jewish Sunrise and Sunset
How can one calculate Jewish sunrise and sunset? I'm not necessarily asking for a formula. Just wondering if there's a difference between Halachik rise/set and what the world considers [e.g. science] ...
3
votes
3answers
108 views
Temimos Thiyenah
On Shavous by Night we wait and daven Marriv late in order to have Temmimos,Why dont we daven early on the second night of Pesach for the same reason?
4
votes
1answer
1k views
Last time for Kiddush Levanah
How can I calculate the last possible time to say Kiddush Levanah for a given month?
11
votes
4answers
185 views
Commencing Shabbos: Shkiya behind a mountain
It is common practice nowadays for Shuls to publish the zmanim (times) to begin Shabbos (the Sabbath) and other activities. These times, it would seem, are based upon standard calculations of sunrise ...
11
votes
3answers
1k views
Putting on tefillin late
For whatever reason, I was unable to put on tefillin while davening shacharit this morning. However, I have access to tefillin now, and the sun has not yet set. After I put on the tefillin, what ...
11
votes
5answers
416 views
Halakhic International Date Line issues
According to halakha, where is the international date line?
More specifically, I have heard that some people say you should observe Shabbat on Sunday in Japan & New Zealand and/or on Friday in ...
