Below are links to helpful sites, grouped by category.
Keeping Yoshon
Date Calculator: Add or subtract shelf life times to get best by and manufacturing dates.
Julian Date Converter: Convert a Gregorian date to Julian or vice versa, in DDD YYYY format.
Food for Life Lot Code Calculator: Scroll to the bottom to find out when Food for Life’s products like Ezekiel 4:9 Bread was made.
OK Certification Yoshon Product Search: Search the OK’s list of Yoshon-certified products under their hashgacha.
Vintage Grain: The Mitzvah of Keeping Yashan by Chasya Katriela Eshkol. For more explanation on anything yoshon, here is a link to get ”Vintage Grain: The Mitzvah of Keeping Yashan”. It is very detailed, but written in terms that newcomers can understand. Order From This Link.
Kashrut
Kashrut.com has resources for anything to do with kosher food, from articles to links and a wonderful program for zemanim anywhere in the world.
cRc Agency List: Find out if Hechsherim are acceptable.
Can Do Kosher! A Quick and Concise Guide to Becoming Kosher by Chasya Katriela Eshkol, is a compact book filled with information. Bring it with you to tavel, or give it to someone who needs to learn the basics. Order from this link.
Company Links
If you have product questions, such as finding out when a product was made, or even not pertaining to yoshon at all, you can click on the logo of the company you need. It will take you directly to the company’s website if it has one.
Updated As Of:
August 18, 2025
Subscribe to Yoshon.com Newsletter and Alerts
Two Ways to Subscribe:
- Fill out the form below to be added to the newsletter list.
- Email your name and email directly to be added to the list at info @ yoshonnetwork.org .