Just a quickie, I am using action script to produce a calendar which is all dynamic to work out what day the month starts on and whether it is a leap year. I am using mostly simple getDate, getMonth etc etc etc
My question: will I have any problems with dates before 1970? as this is the year that UTC (universal time: Jan 1st 1970) starts from?
You won't have problem The date object stores datetime as a number of milliseconds from jan 1st 1970, but all this means is that datetime values representing a time before this will be a negative number.
You will have a problem if you try to store these numbers in Access however (please join me in spitting on Access...), because they're too big! Struth.
By the way, defuzz, search the movies database - I found an a good example that I hacked about for my purposes when I was creating a calendar. There are a few examples to choose from.