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dealing with summer time

romance standard time +2

   
8:08 am on Mar 18, 2006 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



hi,

i've got a function which checks that there are minimum 3 days between 2 dates.

currently i convert to milliseconds and subtract one from the other and check that it is < 24*3600*1000*3

but this is giving me problems if i check dates around the 27th march - which is when summer time starts - i lose an hour and the function returns negative even there are 3 days in between.

is there a way around this particular problem?

many thanks!

gph

5:12 pm on Mar 18, 2006 (gmt 0)

10+ Year Member



Yes, you should avoid calculating days using milliseconds because of daylight savings time. This should give you the idea.

Date.prototype.moveDays=function(days){
return new Date(this.setDate(this.getDate()+days))
};

alert('-20 = '+new Date().moveDays(-20)+'\n\n+20 = '+new Date().moveDays(20))

9:00 am on Mar 20, 2006 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



hi gph,

that's what i've now done. i didn't actually understand what you meant, until i did some investigating and now it's clear.

thanks

 

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