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<?php $intlDateFormatter = new IntlDateFormatter( 'en_US', 2, -1, 'Asia/Nicosia', 1, 'yyyy-MM-dd' ); $intlDateFormatter->setLenient(false); $date = '1990-03-24'; $res = $intlDateFormatter->parse($date); echo "$date - $res\n"; // 1990-03-24 - 638229600 $date = '1990-03-25'; $res = $intlDateFormatter->parse($date); var_dump($res); echo "$date - $res\n"; // 1990-03-25 - $date = '1990-03-26'; $res = $intlDateFormatter->parse($date); echo "$date - $res\n"; // 1990-03-26 - 638398800

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