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26 lines
626 B
JavaScript
26 lines
626 B
JavaScript
function daylights_savings(dt)
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{
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var dst = null;
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for (var i = 0; i < 12; ++i)
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{
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var d = new Date(dt.getFullYear(), i, 1);
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var offset = dt.getTimezoneOffset();
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if (dst === null)
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dst = offset;
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else if (offset < dst)
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{
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dst = offset;
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break;
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}
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else if (offset > dst)
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break;
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}
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return (dt.getTimezoneOffset() == dst) | 0;
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}
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dt = new Date();
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console.log(daylights_savings(dt));
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dt = new Date(1989, 10, 1);
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console.log(daylights_savings(dt));
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