calculate 1st Tuesday ea. January?

Hey All,
I need a little help. Total noob so please be patient.

The idea is to establish thirteen 28 day contact_periods or contact_cycles for a CRM application, on a 4 day offset, for two groups of contacts.

Period_1 begins on the first Tuesday of each January for Group_A and on the first Saturday of each January for Group_B -- from now to eternity.

Period_2 begins 28 days after Period_1 ... something like... $timedate = new TimeDate();
$today = $timedate->handle_offset(date("Y-m-d"), $timedate >dbDayFormat, false);

$StartCycleYear = (1stTuesday_ea_January); //if Group_A || if Group_B ????

$StartPeriod_2 = $StartCycleYear("Y-m-d", strtotime('+28 days'));
$StartPeriod_3 = $StartPeriod_2 ("Y-m-d", strtotime('+28 days'));
//etc...

if ($today < $StartPeriod_2) {
$Period='$StartCycleYear';
} else if ($today > $StartPeriod_2 && $today < $StartPeriod_3 ){
$Period= '$StartPeriod_2';
}
//update visit_by date
$update_visit_by =" UPDATE accounts,contacts,emailman SET accounts.visit_by = '$Period' WHERE accounts.name = contacts.agency_name AND emailman.related_id = contacts.id AND emailman.marketing_id = '8c63da95-3b5f-3348-3465-45245671f1e1' ";
$result = @mysql_query ($update_visit_by); // Run the query.



I offer a rough sketch only. I know the syntax is off, and I can see that such an approach is going to grow into an
unwieldy mass of some 100 odd lines, but if it makes any sense at all, how might I establish/calculate $StartCyleYear
and then add to that date in 28 day increments with conditions for Group_A || Group_B?
Otherwise, I'm MORE THAN OPEN to ANY suggestions as to how I might rethink my approach.

this is why I luuurrrve PHP...

<?php
$start = strtotime("first tuesday jan 2007");
echo date('Y-m-d',$start)."\n";
$te = (28 * (3600*24));
while($x<=12){
$f += $te;
++$x;
echo date('Y-m-d',($start+$f))."\n";
}
?>


how you use those dates in your scenario I dont know, at worst you can just load them into an array and use later (just change the start date for the second group.

Cool! I was sure I had way too much code in the works.
Not sure I understand your example, but it looks promising.
No doubt I'll have follow up questions, but for now...
I'll just have to play with it and see what I can work out.
Till then...
Many THANKS!

Well...
I twisted and turned this Seven ways from Sunday, but ...<?php
$start = strtotime("first tuesday jan 2007");
echo date('Y-m-d',$start)."\n";
?> ... returns 2007-01-14 , but the first tuedsday in January 2007 is 2007-01-02 so... hmmmm?

What am I missing?

weird , my PHP (5.1.6) returns ...

2007-01-02
2007-01-30
2007-02-27
2007-03-27
2007-04-24
2007-05-22
2007-06-19
2007-07-17
2007-08-14
2007-09-11
2007-10-09
2007-11-06
2007-12-04
2008-01-01

which looks right ... I see there have been mods to strtotime() so perhaps thats the issue if you are on PHP < 5.1 ?? ...will have a looksee

Aha!!!

I'm running on 4.4.2, cause 5.1.2 is not supported in SugarCRM 4.0.1f (though I've yet to experience any failings in the CRM running 5.1.2)

If there is a workaround for php4.4.2 I'd sure like to learn about it.
Meanwhile, switching to 5.1.2 it works as promised.
Thanks Again!
TJ

So, moving right along...

Now I'm thinking ...
<?php
$start = strtotime("first tuesday jan 2007");

$te = (28 * (3600*24));
$f += $te;
$period_1= date('Y-m-d',$start)."\n";
$period_2 = date('Y-m-d',($period_1+$f))."\n";
$period_3 = date('Y-m-d',($period_2+$f))."\n";
echo $period_1."<br>";
echo $period_2."<br>";
echo $period_3."<br>";
?>
... but that only gets me
2007-01-02
1970-01-28
1970-01-28

I guess it's the "add to an array" part that I need help with now.:p

Ding !)))
In Round 3 I tried...<?php
$start = strtotime("first tuesday jan 2007");
echo date('Y-m-d',$start)."\n";
$te = (28 * (3600*24));
while($x<=12){
$f += $te;
++$x;
$cycleYear = date('Y-m-d',($start+$f));
$array = explode (' ', $cycleYear);
}


echo '<select name="endDate">';
foreach ($array as $key => $value) {
echo "<option value=\"$key\">
$value</option>\n";
}
echo '</select>';
?> which get's me a dropdown with a single option 2008-01-01 (should be 2007-01-28) How would I convert $cycleYear to an array?

<?php
$array = array();
$start = strtotime("first tuesday jan 2007");
echo date('Y-m-d',$start)."\n";
$te = (28 * (3600*24));
while($x<=12){
$f += $te;
++$x;
// echo date('Y-m-d',($start+$f))."\n";
//}
$array[] = date('Y-m-d',($start+$f));
}

echo '<select name="endDate">';
foreach ($array as $key => $value) {
echo "<option value=\"$key\">
$value</option>\n";
}
echo '</select>';
?> :thumbsup: