This coming שבת, the סיום דף יומי מסכת גיטין coincides with the חזק of finishing ספר שמות. See this fascinating article by R' Dovid Heber of the Star-K. In it, he shows that since the beginning of דף יומי there have in fact been the same number of סיומים as חזק's and goes through the numbers to show exactly why that is. עיין שם,
I decided to take this matter a little further and investigate how many times this has actually happened or will happen, assuming the exact structure of דף יומי remains the same. This is what I found, going back to the beginning in 1923 all the way to the year 2050:
| Beitzah 40 | 1/16/2044 | 16 Teves | 5804 | Vayechi |
| Avodah Zarah 76 | 7/7/2040 | 26 Tammuz | 5800 | Matos Masei |
| Moed Katan 29 | 7/14/2029 | 2 Av | 5789 | Matos Masei |
| Gitin 90 | 3/12/2016 | 2 Adar II | 5776 | Pekudei |
| Shabbos 157 | 3/9/2013 | 27 Adar | 5773 | Vayakhel Pekudei |
| Kesubos 112 | 12/22/2007 | 13 Teves | 5768 | Vayechi |
| Yevamos 122 | 12/24/1977 | 14 Teves | 5738 | Vayechi |
| Temurah 34 | 7/7/1945 | 26 Tammuz | 5705 | Matos Masei |
It is interesting to note that it does not occur on בחוקתי at all in this time, nor does it ever land on שמחת תורה. In fact, looking even further ahead, the only time it will ever land on שמחת תורה between now and the year 2200 will be the following on שמחת תורה in ארץ ישראל:
| Horiyos 14 | Thu Oct 26, 2062 | 22 Tishrei, 5823 |
For anyone curious as to how I was able to figure all this out, I wrote a very short and simple Java application and made use of the brilliant Zmanim API by KosherJava.
And if you're even more curious, here's my code:
import java.util.Calendar;
import java.util.Date;
import net.sourceforge.zmanim.hebrewcalendar.HebrewDateFormatter;
import net.sourceforge.zmanim.hebrewcalendar.JewishCalendar;
public class Daf {
public static void main(String[] args) {
int daf;
HebrewDateFormatter hdf = new HebrewDateFormatter();
Calendar day =
Calendar.getInstance();
day.set(Calendar.YEAR,2050);
//System.out.println(day);
boolean siyum=false;
// While loop to
expose all siyumim that happen on Shabbos. I have to go in manually afterwards
to identify the chazaks.
// I could have
possibly used getParshaIndex() and played with that to expose just the chazaks
but that would have been clunkier
while (day.get(Calendar.YEAR) > 1922){
JewishCalendar jewCal = new JewishCalendar(day);
try{
daf = jewCal.getDafYomiBavli().getDaf();
} catch (IllegalArgumentException
iae){
break;
}
if (siyum){
if (day.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY){
System.out.println(jewCal.getDafYomiBavli().getMasechtaTransliterated() + " " +
daf + ", " + day.getTime() + "," + jewCal + "," + jewCal.getParshaIndex());
}
siyum=false;
}
if (daf == 2) siyum = true; //If today is the beginning of the masechta, yesterday
was the siyum of the previous
day.add(Calendar.DAY_OF_YEAR, -1);
}
day.set(Calendar.YEAR,2200);
//Separate loop
to identify Simchas Torah since it isn't usually on Shabbos
while (day.get(Calendar.YEAR) > 1922){
JewishCalendar jewCal = new JewishCalendar(day);
try{
daf = jewCal.getDafYomiBavli().getDaf();
} catch (IllegalArgumentException
iae){
break;
}
if (siyum){
// If the 22nd or 23rd day of Tishrei
if (jewCal.getJewishMonth() == 7 && (jewCal.getJewishDayOfMonth() == 22 || jewCal.getJewishDayOfMonth() == 23)){
System.out.println(jewCal.getDafYomiBavli().getMasechtaTransliterated() + " " +
daf + ", " + day.getTime() + "," + jewCal + "," + hdf.formatParsha(jewCal));
}
siyum=false;
}
if (daf == 2) siyum = true;
day.add(Calendar.DAY_OF_YEAR, -1);
}
}
}
