Shana Tovah! Gut Yontif!

Happy New Year, 5783!

Another Calendrics Blog Post

Sunday, September 25, 2022 / Erev Rosh ha-Shonah 5782/5783, Yom rishon, 29 Elul, 5782.

David Orenstein, Emeritus, Danforth CTI,

Toronto, Ontario, Canada

At 6:00 pm this evening, I’ll be going to synagogue and, instead of virtually, it will be in-person (but masked). For the first time since Rosh ha-Shonah and Yom Kippur, 5720 (Autumn 2019), we will hear the Shofar (ram’s horn) being blown in-person on the Yamim Nora’im (Days of Awe): Rosh ha-Shonah and Yom Kippur.

Candle-Lighting Times

On the second to last page of my The Jewish Museum 2023 Calendar (September 2022 – December 2023 / Elul 5782 – Tevet 5784) there is a vast array of numbers. They are “Candle-Lighting Times”. There are fourteen columns. Eleven cities from the United States, from Los Angeles (Pacific Time Zone) to Boston (Eastern Time Zone), passing through Denver (Mountain Time Zone) and Chicago (Central Time Zone). Three more: Toronto (Eastern Time Zone), London, England (British Time Zone), and, of course, Jerusalem.

They are grouped in sixteen monthly blocks: September to December, 2022, and January to December, 2023. About half the times are in bold on a shaded background: Daylight Saving Time. The others are in normal font on a white background: Standard Time.

Usually, Jews in all fourteen cities will either all be on Standard Time or all on Daylight Saving Time. But not all the time!

The pattern will be at its most interesting in March 2023. Everyone will be lighting their Shabbat candles on Friday, March 10, using Standard Time. That will be 5:59 pm in Toronto.

By the next week, Friday, March 17, all the North American cities (including Toronto) will have moved up to Daylight Saving Time: 7:08 pm in Toronto. Yet London (5:49 pm) will have remained on Standard time, as will Jerusalem (5:08 pm). They were lighting candles the previous Shabbat at 5:37 and 5:03 pm, respectively.

The next Friday, only London will be the Standard Time hold out. And finally on Friday, March 31, the Jewish communities in all fourteen cities will be using Daylight Saving Time for Shabbat lighting: 7:25 pm in Toronto.

And to think, Sir Sandford Fleming wasn’t even Jewish!

The High Holidays

This is the last of the 29 days of the month of Elul.  5783 will then start at sunset today: in Toronto at 6:51 pm. It will then be the 1st of Tishrei, 5783, and the first day of the two-day Holy Day of Rosh ha-Shonah (in Hebrew, literally “The Head of the Year”). Soon to be followed by the Day of Atonement, Yom Kippur (Yom revi’i, 10 Tishrei, 5783 = Tuesday / Wednesday, October 4 / 5, 2022).

And soon it will be Simchat Torah!

Simchat Torah is a joyous holiday (23 Tishrei / Mon., Oct. 17 – Tues., Oct. 18 in 2022) when we celebrate the gift of the Torah and start reading the Torah once more. The first Parshah (weekly reading) is Bereshit (“In the Beginning”), Genesis Chapter 1, Verse 1 to Chapter 6, Verse 8.

Bereshit begins with the Creation. And modern Science, and in particular geology, especially the discipline of tectonics, fills in the details.

CTG Fall 2022 Workshop

That’s why I feel very good about going to the Fall Workshop of the Canadian Tectonics Group on the Shabbat within the Days of Awe: Saturday, October 1, 2022.

My paper will be on “The Cross-Cordilleran Excursions of the 1972 International Geological Congress, a Semi-Centennial Celebration.” This topic will be familiar to followers of this blog.

I’ll be speaking from 9:50 am to 10:10, with a short question period until 10:15 am. That is, on Mountain Daylight Time (MDT). For me, in Toronto on Eastern Daylight Time (EDT), it will be at 11:50 am EDT, a very civilised start time.

The legacy of Sandford Fleming is ubiquitous!

My talk is in the field of History of Geology, the others are instead on Geological History. It’s an exciting field couched within the grand narrative of Plate Tectonics. That’s a theory developed in the 1960s and ‘70s by Canada geophysicist J. Tuzo Wilson.

Unfortunately, registration closed on Tuesday, September 20.

Later in the month, Saturday, October 8, I’ll be part of another Geological seminar day. This time it will be all History of Geology. That day we will be focusing on the history of the International Geological Congresses. All of them, not just the 1972 IGC in Montréal.

But that’s another story!

Shana Tovah!!


Presentations at CTG 2022 Fall Workshop, Saturday, October 1; Online by Zoom.

All times MDT = PDT + 1 = CDT – 1= EDT – 2 = ADT – 3 = NLDT -3.5

Session 1: 9:00–10:15 am, MDT (8:00am PDT,10:00 CDT,11:00 EDT,12:00 ADT,12:30 NLDT)

9:00 – 9:20      T. Stephan and E. Enkelmann; What stresses the Canadian Cordillera? – A statistical analysis of the first-order intraplate stress field of western Canada

9:25 – 9:45      D. MacLeod and D. Pattison; Late Cretaceous to Eocene exhumation of the southern Purcell Mountains, southeastern British Columbia

9:50 – 10:10    D. Orenstein; The Cross-Cordilleran Excursions of the 1972 International Geological Congress, a Semi-Centennial Celebration

10:10 – 10: 30 BREAK


Session 2: 10:30 – 11:45 AM

10:30 – 10: 50 W. Langenberg and K. Larson; Dating of slicken-fibres on bedding and fractures of the Livingstone Thrust sheet, SW Alberta

10:55 – 11:15 T. Cawood, J. Peter, D. Petts, and M. Polivchuk; The effect of deformation and metamorphism on critical metal distributions in massive sulfides: Preliminary results from the Windy Craggy Cu-Co VMS deposit, northwestern B.C.

11:20 – 11:40  L. Harris, P. Abidan, O. Göğüş, R. Pysklywec, and R. Fischer; Critical mineral deposits localised by mantle drips and reactivated lithospheric-scale structures in Türkiye and E Canada

11:45 – 12:30 BREAK


Session 3: 12: 30 – 1:45 AM

12:30 – 12:50  T. R. Morrell, L. Godin, and R. Soucy La Roche; Along-Strike Diachronous Thermo-Kinematic Evolution of the Himalayan Metamorphic Core in Western Nepal

12:55 – 1:15    D. Garcia, L. Godin, and I. Coutand; Thermal history of the Frontenac Arch in southeastern Ontario, Canada: Constraints from low temperature thermochronology

1:20 – 1:40      E. Gosselin, R. Soucy La Roche, K. Larson, and A. Moukhsil; Linking titanite U-Pb, microstructural and trace element data to deformation and metamorphism in a late-Grenvillian shear zone, Saguenay-Lac-St. Jean, Québec

1:45 – 2:00 PM           BREAK


Session 4: 2:00 – 2:50 PM

2:00 – 2:20      R. Hieber and D. Boger; The two-stage metamorphic evolution of the southern Ubendian Belt

2:25 – 2:45      Q. Wu, S. Lin, and A. Unger; A discontinuous Galerkin level set method applied to the modelling of deformation patterns in tectonic flow


Virtual Poster Session – Available from 8 AM to 6 P PM.

Presenters will be available at their posters from 3 PM to 4 PM


CTG Fall 2022 Field Trip and Virtual Workshop.

CTG Fall 2022 Virtual Workshop Programme and Abstracts as PDF.

History of the International Geological Congresses, Saturday, October 8, 2022.

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