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

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Minyan, netz hachomah, and precision in time

There are halachic sources that discuss the importance of davening shemona esrei at netz (at sunrise), some of which state that it is preferable to daven at netz over davening with a minyan (at least ...
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67 views

Timing of Maariv / Havdalah at the end of Shabbos

Is it required that all elements of Maariv / Havdalah at the conclusion of Shabbos come after dusk, or may some part come between sunset and dusk?
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Which “shita” did the 5 rabbis in the Haggadah follow regarding the earliest time for morning Shema?

This section from the Haggadah: Pesach Haggadah, Magid, Story of the Five Rabbis 1: מַעֲשֶׂה בְּרַבִּי אֱלִיעֶזֶר וְרַבִּי יְהוֹשֻׁעַ וְרַבִּי אֶלְעָזָר בֶּן-עֲזַרְיָה וְרַבִּי עֲקִיבָא וְרַבִּי ...
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What is the difference between Sfardic and Ashkenazic calculations for the last time to eat chametz?

My community's luach (calendar) has 2 separate times for the last time to eat chametz on Erev Pesach: 10:09 for Ashkenazim, and 10:13 for Sephardim. How are these times calculated according to the ...
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226 views

Is there any evidence of time-zones in Talmud? (Tanaim and Amoraim only)

There are many verses in the Talmud, Midrash and Siddur that state that the sun and moon rise and set through gates in the firmament. This would imply that there are no time-zones. To this world view ...
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34 views

Zmanim in Space [duplicate]

If an astronaut is in space, how does he or she determine what time to pray? Does it revolve around where the spaceship is in relation to the sun, or does he just follow zmanim on Earth?
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Hallel before chatzos at seder

I was reading Rav Schwab On Prayer (page 541) where he says the following about the timing of parts of the Seder: According to some poskim, even the recitation of Hallel should be completed before ...
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2answers
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Why are mincha gedola and ketana named that?

What is big about the earlier mincha time and what is small about the later mincha time? Also, why does the term plag mincha make sense? It would seem to be a term that refers to the point midway ...
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Customs regarding reciting the Shema after the allowed time

The latest time for reciting the קְרִיאַת-שְׁמַע is ׁשׇׁלוֺש ׁשׇׁעוֺת זְמׇנִיּוֺת (three variable hours) after sunrise. On Shabbat, many communities recite the morning Shema after this latest ...
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Determining times of Halachic import on a long flight

If I'm taking a long flight on an airplane on a day when permitted activities change at a certain point, e.g. with the start or end of a fast day, or with the start of the chametz prohibition kicking ...
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1answer
42 views

Said Kiddush Levana prior to three days after Molad - Does he say it again?

Be'er Hataiv 426:10 says that one can say Kiddush Levana as early as 3 days after the Molad. The Rambam - Hilchos Brachos 10:17 rules that one may say Kiddush Levana immediately after the Molad. ...
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A Jew is born in space. What time rules does he follow?

I know that the title sounds like a sequel to a TV show (Lost in space). But based on a statement in this article : The Rabbis therefore rule that a person should continue to follow the time ...
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57 views

Rambam, Shkiah, and Tzet HaKokhavim

In the dispute between the Geonim and Rabbenu Tam over the definition of nightfall, I have seen the Rambam claimed by either side - each claiming that in the Mishneh Torah he held like them. My ...
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1answer
54 views

Which Rishonim held of shkia/tzeis according to the zman of Rabbeinu Tam?

Which Rishonim held of shkia/tzeis according to the zman of Rabbeinu Tam? Ive heard the Shulchan Aruch (rishon/acharon) held of it, did he pasken like for starting shabbos?
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Why is the mitzvah of tefellin not by night?

Berachos discusses the importance of saying shema while wearing tefellin. Saying shema without tefellin is likened to bringing an incomplete sacrifice (Berachos, 14b). Similiary, one who washes his ...
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Choosing between Brachos on Shma and Sof Zman Kriyas Shema

Let's say Yosef woke up late one day, and by the time he was ready to say kriyas shema, it was two minutes before sof zman kriyas shema (the latest time at which a person could say kriyas shema). He ...
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What happens if I wrap my tefillin before the earliest time to wrap tefillin? [closed]

The earliest time to wrap tefillin in my town is 6:14 (for the next little while), on Monday and Thursday we start at 6:15. Is it OK if I finish wrapping my tefillin before 6:14? Do I still get the ...
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1answer
193 views

Is the Fast of Tevet considered a 24 hour fast?

Is the Fast of Tevet considered a 24 hour fast, or does it begin in the morning until early evening?
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Following more lenient opinions for fasting times

Related: Until what time in the morning may you eat on a fast day? There are different opinions about exactly when one must start fasting. For someone planning to wake up to eat, all agree that they ...
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If צאת is late, then פלג is late. When does one light the מנורה on Friday?

One cannot light the Chanuka lights before p'lag hamincha (Shulchan Aruch 672:1), not even on Friday evening (Mishna B'rura 679:2). If he did so, his lighting is invalid (Shaar Hatziyun 672:4). P'lag ...
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355 views

Chanuka candles if missed the night

If someone, not on purpose, did not light chanuka candles at night, should he light during the day? With or without a brocho?
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Flying During Channukah Candle Lighting

Obviously you cannot light candles on a plane, so if you can't light candles within the time frame is there any other activity one could do, which is permissible on an airline, that would fulfill the ...
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299 views

Sh'kiya alarm app (iOS)

Since the time-change, I have been rather off in calculating when I should say minchah. Is there an app which has an alarm for sh'kiya (or secular sundown timing if they differ) which is available for ...
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Pray hurriedly as soon as time comes for mincha/maariv arrives or wait but pray with more kavanah

Suppose one works in a non-Jewish office environment with rooms that can be used for prayer. Should one wait till one arrives at home and pray Mincha there at leisure or do it at work earlier when ...
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Machlokes Hatanaim when Kriat Shema should be said

The first Blat of Berachot tells us about a Mahlokes when Krias Shema should be recited. There are almost 10 shitos there. What is the Machlokes-is there a Sevara for each shita? For instance, the ...
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114 views

What time is sunset?

Is sunset (Shkiya) the time the sun hits the horizon or when it sunk completely below it? What about sunrise?
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When can one “bring in” Yom Kippur?

I've read in several places that one must bring in Yom Kippur before dark, just as we do for Shabbos. The time listed as the beginning of Yom Kippur (e.g. MyZmanim) seems to be 18 minutes before ...
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If kings get up at 3 hours past sunrise, wouldn't they need some extra time to say Shma?

Mishna Brachot 1:2 gives the times for saying Shma in the morning. מאימתיי קורין את שמע בשחרים: משיכיר בין תכלת ללבן; רבי אליעזר אומר, בין תכלת לכרתן. עד הנץ החמה; רבי יהושוע אומר, עד שלוש שעות, ...
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Biblical vs. Rabbinical end of Shabbat

This question states, "havdalah ends shabbat (for one who didn't daven ma'ariv)." But won't Shabbat end on its own at some point--specifically, at nightfall--even if we don't make havdalah nor daven ...
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Mir Yeshiva and the Dateline

For a short while, the Mir Yeshiva was relocated to Kobe Japan at the outbreak of the Second World War. Since Japan is in question with the International Dateline how did the Rosh Yeshiva Pasken for ...
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Shacharis after chatzos

Is praying shacharis after chatzos (midday) permitted, and do you fulfill your obligation? If so, until when? Please give sources, preferably quoting the Mishna Berurah, Alter Rebbe of Lubavitch, or ...
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Saying Tehilim after shkia

I understand you can't say Tehilim at night. Can you say Tehilim between shkiah and tzeits hakochavim (ben hashmashot)? or does it have to be said before shkiah?
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Why don't Rabbinic fasts end by Ben Hashmashot?

There's a doubt in the Gemara when the new day starts, at sunset or at three stars (Ok, and there's Rabbi Yossi's opinion). When it comes to Shabbos (or any other biblical time), we have to be strict ...
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Mussaf before Mincha Katana

[This is not a request for a psak, as I did say Mussaf on time today, B"H.] If it is now after Mincha Gedola, but before Mincha Ketana, and there is no Minyan, what should an individual say first, ...
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Praying after chatzot– which tefilot?

Assume that someone wakes up after chatzot; which tefilot are said?
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Spices and candles before your zman

If one holds 72 minutes for shabbas to be over and they are staying by someone who holds 50 minutes and they make havdalla by 50 min can the 72-minute-people participate in their havdalla to fulfill ...
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1answer
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Is the timing of Mitzvot more intentional or more extentional?

This question is inspired by: Halakhic International Date Line issues I was reading the answers, or actually the source quotations, and realized that the answer to the questions about ...
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Earliest and Latest Times for Kabbalat Shabbat?

If one is davening alone, what are the earliest and latest times for reciting Kabbalas Shabbos? If one was too busy preparing for Shabbos to say it at the normal time, may one recite it at any time ...
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274 views

Bathroom or shema if you only have time for one?

If you wake up 5 minutes before sof zman kryat shema and you have to use the bathroom. Going to the bathroom when necessary is deorayasa (Shulchan Aruch 3:17) and so is saying the shema. Also there ...
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Travel and Shacharit

I'm flying westward in the morning. I don't think I'll have enough time to pray shacharit before I take off, and don't wish to do so en route. I should land with enough time to pray shacharit before ...
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139 views

Correct procedure for davening in Synagogue after sof zman tefila

In America, it is very common for shuls to start quite davening shacharit quite late on Shabbat. Suppose someone is going to be attending a synagogue that will not reach shmoneh esrei before sof zman ...
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The Effect of an 18- or 6-Hour Day

Since the 18th century, Jews have been settling in Sweden without the requirement of conversion (source). As such, there are now a number of Swedish Jewish communities, the largest of which is in ...
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Shabbos in Tahiti [duplicate]

I have a friend who is interested in going to Tahiti for a weekend. I was wondering if there are any issues with the halachic dateline and if he would have to hold 2 days of shabbos.
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101 views

Finished Kriat Shema after the deadline

If I start the Shema before the zman but I finish the 1st 3 paragraphs after the alloted time, what is the halacha?
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149 views

Bringing in Yom Tov Sheni early

The Ben Ish Hai Parshat Bamidbar Din 2 holds it is permissible (and even recommended in Bagdhad), to bring in the second day of Shavuot early -- to daven and to make kiddush while it is still daytime ...
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2answers
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when do you stop eating bread and etc.. for passover?

Do you stop eating bread once Seder starts or beginning of the morning of Seder day? Not sure about this
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Eating after shkiah on a weekday

ב"ה I know one isnt allowed to eat after Shkiah on Shabbos. But what about a weekday? For instance what if one started a meal right before shkiah or during bein hashmoshis? My question is prompted ...
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Violating the Shabbat across time zones [duplicate]

Let's say I'm on my computer in the United States on a Friday afternoon, well before the sun has set in the US, but after it has set in Israel. If I access an Israeli website during this time, am I ...
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242 views

Time for t'filah and you don't have a siddur: better to daven from memory or wait (and possibly miss the time)?

If the set time comes to daven (on a weekday, let's say) and you unexpectedly don't have a suitable (or any) siddur,1 does halacha call for you to wait (and possibly miss that amidah entirely), or ...
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166 views

What can I skip after Amida in Shacharit?

I have very little time for shacharit, because I have to go to work. The minyan in the city where I live is very late. So I try to daven everything before the Amida and the Amida itself with a Tzibur, ...