 Hi guys, welcome back to my YouTube channel. This is Daniel Rosel here. Today is the Jewish fast day called Asara Betavet, the 10th day of the Hebrew month of Tavet, and it's one of the minor fasts. So that means that it's not a full 24 to 25-hour fast like we have on Kippur and Tisha Be'ab. It's a shorter fast that begins at dawn and it ends at Sete Kochavim, the emergence of three medium-sized stars, I believe. Now, I'm not a rabbi, I'm not a religious authority by any means whatsoever, and I'm not going to, that's why the details are sketchy to me. I'm not going to talk about them. What I wanted to do instead was, I thought, would be interesting to take a look at one of these manim calculators in order to see how much these manim are going to change, depending on exactly where you are in the world. Now, that's basically because Jewish religious times as manim are based around the sun, and basically where you are in the world is going to make a difference to the sun time, particularly as you go west and east. It's going to make a difference. So here is the manim, here's one of the manim calculators on the Chabad website, actually. And typically one of these manim calculators, they'll have presets for all the major Jewish cities. So whether you're in Jerusalem or New York or Boston or any city with a sizable Jewish population, they'll have that as a preset. But they'll also give you the option to calculate manim based upon your geo-coordinates, which is really useful if you're spending Shabbat in some random village in Iceland that has no Jews and is not a preset on any of the calculator. So that's why that exists, and it's really helpful. So on the, there's a couple of them, there's also maizmanim.com, but I'm going to use the Chabad calculator in this instance. Now, if we go on to more options, you can either put in a location or you can click on use coordinates, latitude, and longitude. So what I'm going to do here is just for the purposes of demoing, I'm going to choose two random locations in a city and I'm going to see how much of a difference that makes. So let's go into Jerusalem here and let's choose somewhere in east Jerusalem as far east as we can go. That's for the sake of accuracy, let's, let's pick a Jewish neighborhood. So let's take Talpyot Mizrach, Armona Naziv, and let's pick a random point here. So we can see by right clicking, I'm actually going to do that again by right clicking on Google Maps anywhere. So if I right click here, for instance, it's going to give you here the geo-coordinates. In this case, it's 31, 7, 5, 1, 5, 8. That's the latitude and 35 decimal 24106 is the longitude. Now, one thing to know about latitude and longitude, if it's a positive value, it means north. So you can see 31 here is positive. That's a degrees north of the equator and it's a positive integer for longitude. That means east of Greenwich. So if it's west, it's going to be negative. And likewise, if latitude is going to be negative, it's going to be, that's going to mean you're somewhere in the south equator just to demonstrate both those things. So if you went somewhere, let's say in the south equator here, that was west of Greenwich. And let's just pick this random location here. We can see we've got two negative values. It's negative 14 degrees latitude and negative 39 degrees on longitude. So just a little thing to know in order to make sure that you're getting accurate geo-coordinates. So let's go back to this random place here in Tapeote and it doesn't really matter where I choose. So let's just go for somewhere like this. 31.753825. Now, the other thing to say about geo-coordinates is that there's two common ways to denote them. So this is the decimal system here. It gives each a decimal, but there's another way and that's writing it in terms of degrees of latitude or longitude, minutes of latitude or longitude, and seconds and minutes and seconds are each 60. They're different denotations systems. Now you can use, I'm just going to move this clipboard over to my other screen here, you can use a tool like this if for whatever reason you need to convert between the two. So here I'm putting in my latitude here and I'm going to put in my decimal longitude and convert and I can convert that to both latitude and longitude expressed in degrees, minutes and seconds. So that's just really a useful thing to know as well. If you do have a tool for calculating Zmanian that actually expects you to put in the geo-coordinates in that format. So with the Chabad website here, it doesn't actually specify which it's going to ask for. So what I'm just going to do put in what I got out of Google Maps here. So I'm going to put my latitude as 31.75, my longitude as 35.24 plus other decimals. And I'm going to call this a location east, talpi, east, talpios. Okay. And I'm going to click submit. An error has occurred. Please select, please select the value for the time zone. Okay. So I'm just going to do this again. Time zone is going to be a UTC plus two does not matter which city you choose. And we're off. Okay. So this is calculating for a custom location and you can actually see that it's kosher with the decimal format. If these were appearing with little symbols for degrees, which is a degree symbol and minutes of latitude, longitude, which is a single quotation symbol and seconds, which is going to be a double quotation mark. You'd know that you entered in a format that was not expected. So just make sure that you're, you're giving it something of likes. And so, and based on that, you should be getting accurate calculations. Now, if we look here, we can see that it's calculated the time, the fast ends today as being 504 pm. And there's different opinions about, if you go to the top here, you can usually see this rabbi says this, this rabbi says this, I'm not going to get into that. I'm just going to, the purpose of this video is just to show what kind of a change you can expect from small differences here in East and West within a city. So that was our place in East Talpiot. I'm just going to mark this down here. So for East Talpiot, we achieved a fast end time. It's East Talpiot, say to go Javim equals 1704 hours. Now we're going to repeat the experiment, but we're going to go West. So let's go to somewhere West. That's technically still in Jerusalem. So let's say a hard enough that is still I believe within Jerusalem municipalities. Now, its geolocation is 31.783049935.17. So this was the geo coordinates of Talpiot. These are the geo coordinates of hard enough. What I'm going to do now is run these into change the location in these many calculator. So I'm going to go to change location, keep the time zone, and I just need to over rice these geo coordinates with the updated one. It's also going to be UTC plus two. And this time we're going to call this a hard no Jerusalem. Okay, let's just verify that this has worked out here. Nope, that's still showing the first one. So something's gone a little bit wrong here. 31.7830499 and 35.1759969 and hard enough Jerusalem. And I'm going to just hit submit again. Yeah, okay, so we've got the good, we've got the right ones now. And now it's showing that fast ends as 504. So there's actually no time difference if we moved within Jerusalem. So just to give you an example of how far we are between these two points, being very approximate here, measuring from this point here in Givat Sha'ul, and going all the way to this point here in, let's see where we were, Tapeot Mizrach. Okay, I've kind of just screwed this up a small bit here. I'm going to give this another go. A little bit hard to do the measuring thing at this level of scale. Measure distance to Tapeot Mizrach. There we go. So that's a distance of about six kilometers. And that's as the crow flies between these two locations. Now, 504 was going to be our starting point. So let's see if we go to Mevaceris Seon and some west point in this, if we're going to start getting a different time. So I'm going to repeat the experiment here. Going to be taking those, this copy to the clipboard. So now I'm going to be putting up here. Yep. Mevaceris Mevaceris Seon. And we can see now that we are 31 point. So the, if we see here, this figure is what's really important. This is a longitude figure. So this was 31.17. And now we're at 31. This is rounding, of course. Now we're at 31.14. So the longitude is less. Therefore, it's less west of Greenwich. And therefore it's west of the first point. So we should get a later time, I think. But let's see, we'll put these into the calculator here. And again, we're going to do a change location function here. And now we're going to 31.80 and 31.15. We're going to call this Mevaceris Seon. Hit the submit. Still at 504. No difference yet. And let's see how far we went here. We went from, let's give or take 10 kilometers as the crow flies. So let's go a little bit further. Let's go not somewhere that the times be the same, but let's go all the way over to somewhere in Modi-Een here. And I'm going to do again the same thing. Copy those to clipboard and put this up here. And we're going to get this as our times in Modi-Een. And hopefully we should have a different time according to the calculator. Change location here. And let's hit submit. And now we have 505 finally. So I don't know if that was interesting. That was just to, I guess, show what kind of a difference a location makes in terms of getting different monies. So what we found was that Jerusalem is a pretty small city in all its direction. So about, we went up to 10 kilometers. We got the same time. Sorry, five kilometers in the Jerusalem that we went to 10 kilometers between Taupiot, Mizrahi and Mevaceris Seon. We got the same time. And then when we moved another 26 kilometers as the crow flies going westwards, the time that the fast ended was one minute later. So that is how to look up as many according to geocoordinates on one of these websites. And those are the sort of differences you can expect to see.