Here is a function in that will return true if daylight savings is in effect:
function isDST(d) {
d = qie.deduceDate(d);
return java.util.TimeZone.getDefault().inDaylightTime( new Date(d) );
}
Here is a sample on how it is used:
qie.debug(
'jan 2: ' + isDST('20230102102300') + '\r' +
'feb 2: ' + isDST('20230202102300') + '\r' +
'march 8: ' + isDST('20230308102300') + '\r' +
'march 16: ' + isDST('20230316102300') + '\r' +
'april 2: ' + isDST('20230402102300') + '\r' +
'may 2: ' + isDST('20230502102300') + '\r' +
'jun 2: ' + isDST('20230602102300') + '\r' +
'jul 2: ' + isDST('20230702102300') + '\r' +
'aug 2: ' + isDST('20230802102300') + '\r' +
'sept 2: ' + isDST('20230902102300') + '\r' +
'oct 2: ' + isDST('20231002102300') + '\r' +
'nov 1: ' + isDST('20231101102300') + '\r' +
'nov 10: ' + isDST('20231110102300') + '\r' +
'dec 2: ' + isDST('20231202102300') + '\r'
);
Here is the output from the debug statement:
jan 2: false
feb 2: false
march 8: false
march 16: true
april 2: true
may 2: true
jun 2: true
jul 2: true
aug 2: true
sept 2: true
oct 2: true
nov 1: true
nov 10: false
dec 2: false
