Feature Request Julian Date

[big610]

Feature request: Add Julian Date, of if easier make a separate Portable app.
Julian Date is the sequence count of each day, of the year. Continuous count.
Examples: January 1=001; February 19=050; December 31=365 or 366

The Julian date is used as secret code with Food Manufacturers to show the date of expiration.
The reason done, distributors are dishonest, add fake expiration stickers, to move old stock, having no idea a secret Julian code exists.
Owners/Chefs have told & taught me, they used a printed Julian wall calendar, since all Julian apps are not a simple 001 thru 365/366, and to always look for a hidden code.
The reason done, distributors are dishonest, add fake expiration stickers, to move old stock & do favors for those paying a under table bonus, to give preference to their product, and hijack everyone else. In addition to get a side deal, know body admits to. Any consumer complaints to the Manager are covered up, go nowhere.

Many countries have no rules to enforce, just very certain items like baby formula is enforced, so it's a common game to play.
The rules are, Non potential hazardous food.
Potential hazardous that support Pathogenic spoilage bacteria temperature control or Non Potential hazardous low moisture.
I've be thanked by the rule's enforcers, saying nothing can be done, but thank you for informing, they shop at the same places I shop, now know what to look for in their personal life, as they admit have come up with bad food.
Baking products & bakery, I see the most, as they get green/blue mold, for anything they don't move.

Your work as a Developer is cleaner than others, in the date category. Other developers use the Julian current value long number.
Julian is more popular than Gregorian. Why CalenderKart below does not do.
If the labor is easy, you could have two choices, with Julian as default.

https://calendarkart.com/julian-date/
"Food manufacturers mostly use the Julian calendar to identify the date manufacturing date of a product. To read Julian date printable calendar, follow the below method:"
https://en.wikipedia.org/wiki/Julian_day
https://en.wikipedia.org/wiki/Gregorian_calendar
The Julian day is the continuous count of days since the beginning of the Julian period, and is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g. food production date and sell by date).[1]
https://en.wikipedia.org/wiki/Julian_day
The current discrepancy between the Julian and Gregorian calendars is 13 days. However, the difference will become 14 days in 2100.
(2025 not done, 2024 example)