Assuming for simplicity that January 1st falls on Monday, and the year is 365 days long, Week 30 would be Monday 23rd July.
The given date was a Tuesday.
The given date was a Friday.
The given date was a Thursday.
The given date was a Sunday.
The given date was a Thursday.
The given date was a Friday.
30 May 1997 was a Friday
5 week after July 30 2010 is September 3 2010.
January 1, 2011 was a Saturday. Counting from the 2nd, the start of the 30th week was July 24th.
October 30, 1950, fell on a Monday. You can determine this using a perpetual calendar or by applying a calculation method for finding the day of the week for any given date.
The first week of advent is the Sunday after St. Andrew's Day which is November 30. It is also 4 Sundays before Christmas Day. The 2012 date is December 2 and the 2013 date is December 1.
The "expiration date" is what they call the "best if purchased by" date, but it is recommended by their website that you consume it by that date, or soon after. It also said that in the case of their pourable dressings, that you should consume no more than 30 days after that date.