Day of week from Date?

Anyone know how to figure out the day of the week from the date? ie, if I use llgettimestamp to get the date... how do I know if today is wednesday?

I figured this out once. I forget the exact algorithm, and I'm not in-world right now to go fetch it.

I sell some wrist-watches, the source code for which I've tagged GPL. Grab a landmark from my profile picks to find a copy

why not use this:

string strDate = llGetDate();

see that here llGetDate

That page also has a link to llGetTimeStamp()

If you wanted to use the llGetTimeStamp() function, then use a string parsing command to get the first 10 characters from the string produced by the llGetTimeStamp().

string strDate = string result = llGetSubString(llGetTimeStamp(), 0, 9);

(I think that should work)... only don't try that in the global definitions area, it might not work there.

Samhain, I believe Mike wants to know the day of the week (like today is wednesday), not the current date.

I couldn't find the Francis' GPLed code, but I've been using this function (algorithm based on Zeller's congruence):

// Returns the day of week for the given day, month and year
// Day 1 is Sunday, 7 is Saturday
// Author: MSo Lambert
// Free to use and modify
integer DayOfWeek(integer day, integer month, integer year)
{
    integer century;
    integer i;
    
    month = month - 2;
    if (month < 1)  
    {
        month = month + 12;
        year = year - 1;
    }
    
    century = year / 100;
    year = year - century * 100;
    i = (260 * month - 15) / 100 + day + year + year / 4 + century / 4 - century - century;
    
    if (i < 0)
    {
        i = i + 7;
    }
    
    i = i - i / 7 * 7 + 1;
    return i;  
}

Example usage:

// Constants
list DAYS_OF_WEEK = ["Sunday", "Monday", "Tuesday", "Wednesday", 
                     "Thursday", "Friday", "Saturday"];
...

llWhisper(0, "9/22/2004 was " + llList2String(DAYS_OF_WEEK, DayOfWeek(22, 9, 2004) - 1));

Thankyasir, I do belive that'll do it

Oops! I must have been sleepy reading that. Somehow I knew my answer was too easy! =)