Curry's was easy, since I had a quote to search for, which gave me the date of the strip. I thought Meat's was going to be tough, but then I stumbled on this site, which allows you to search for strips based on some keywords. From there, it was just a matter of finding the correct strip from the results, which gave me the date.
This site has all the strips. If you sign up (I just did a free trial membership), you can choose specific dates for strips.