I have a spreadsheet with a column devoted to lot numbers. The lot numbers
contain information identifying the date of manufacture. I would like to set
up another column where the date of manufacture is displayed from info taken
from the lot number column.

The numbers are of the format:
ABC85J123D456
or
AB-85J123D456

The fourth and fifth positions represent the year of manufacture, and the
sixth position represents the month ("A" is Jan, "B" is Feb, etc -
incidentally, "I" is skipped because it can be mistaken for a "1").

I would like my date column to look at the 4th through 6th positions in the
lot number, and return a date in format "mm/dd/yy", where the "dd" equals
"01" (the day isn't important to my spreadsheet).

Can someone assist? And, thanks in advance.

Bill K