index.js 498 B

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  1. import toDate from "../../toDate/index.js";
  2. import requiredArgs from "../requiredArgs/index.js";
  3. var MILLISECONDS_IN_DAY = 86400000;
  4. export default function getUTCDayOfYear(dirtyDate) {
  5. requiredArgs(1, arguments);
  6. var date = toDate(dirtyDate);
  7. var timestamp = date.getTime();
  8. date.setUTCMonth(0, 1);
  9. date.setUTCHours(0, 0, 0, 0);
  10. var startOfYearTimestamp = date.getTime();
  11. var difference = timestamp - startOfYearTimestamp;
  12. return Math.floor(difference / MILLISECONDS_IN_DAY) + 1;
  13. }