This setup shows a 6 digit code containing the filling date and a 7,8,9 digit manufacture date lot code. The first 6 digits before the hyphen show the date of filling, the digits after the hyphen show the manufacture date.

The manufacture date is stored in the first 5 digits after the hyphen. Where the first 2 digits show the manufacture year and the last 3 digits show the Julian day of manufacturing.

This setup is often used for kits and shows the manufacture date of the kit. If the label shows multiple of these, only note the one that has the oldest manufacture date. It is a 5-digit lot code. The first 2 digits refer to the manufacturing year. The next 3 digits are the Julian day.

Therefore, for lot code 21277, the manufacture year is 2021 and the Julian day is 277 making the exact manufacture date October 4^th 2021.

The first combination of letters and numbers show the lot code, the second part after the P shows the month and year of production. To set a baseline, we always use the first day of the month to calculate the manufacture date.

Therefore, for lot code PG01HB P.02/22, the manufacture date is February 1^st 2022.

Being a variant on setup 1, it reads similarly. The first 2 digits refer to the manufacturing year. The 3 digits after that are the Julian manufacture day. In this case, it would be the year 2022, Julian day 129, making it May 9^th 2022.

This setup is used for samples with 2 products. Each code shows a manufacture date; the earliest date should be used. 1^st digit = year, 2^nd digit = month (A= Jan, B= Feb...), 3^rd-4^th digits = day.

For batch code 2H1812-2H3003, the dates are August 30^th 2022 and August 18^th 2022. Use the earliest date: August 18^th 2022.

This setup is used for samples with 2 products. Each code shows a manufacture date; the earliest date should be used. 1^st digit = year, 2^nd digit = month, 3^rd-4^th digits = day.

For batch code 3A2522/3A2523, the dates are January 25^th 2023 and January 25^th 2023. Since they’re the same, use January 25^th 2023.

This setup is used for samples with only 1 product. 1^st digit = year, 2^nd digit = month, 3^rd-4^th digits = day.

For batch code 3A2411, the manufacture date is January 24^th 2023.