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

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3
votes
2answers
149 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?
8
votes
2answers
462 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 ...
5
votes
1answer
111 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 ...
7
votes
1answer
107 views

Candle Lighting Time: Why Then?

Why 18 minutes (or other minhagim). Where did these numbers come from?
4
votes
1answer
217 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
169 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?
5
votes
2answers
627 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 - ...
3
votes
3answers
206 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 ...
4
votes
2answers
68 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?
3
votes
2answers
403 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
360 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
198 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 ...
2
votes
1answer
342 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
1answer
256 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 ...
10
votes
1answer
290 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?
8
votes
1answer
442 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 ...
3
votes
3answers
123 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?
2
votes
1answer
556 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
436 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
296 views

Optimal time for Meal on Purim

What is the optimal time for the Purim Seduah (Meal)?
8
votes
1answer
2k views

Davening on Plane Zmanim

How do you know when to daven Shachris on a plane?
3
votes
3answers
61 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
532 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.
9
votes
2answers
315 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 ...
8
votes
3answers
248 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
146 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.)
5
votes
1answer
219 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"?)
2
votes
1answer
118 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 ...