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Convert Excel date values to JavaScript date objects
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| // SMH Adjusted for Google Sheets (+2 instead of +1) | |
| // Convert Excel dates into JS date objects | |
| // | |
| // @param excelDate {Number} | |
| // @return {Date} | |
| function getJsDateFromExcel(excelDate) { | |
| // JavaScript dates can be constructed by passing milliseconds | |
| // since the Unix epoch (January 1, 1970) example: new Date(12312512312); | |
| // 1. Subtract number of days between Jan 1, 1900 and Jan 1, 1970, plus 1 (Google "excel leap year bug") | |
| // 2. Convert to milliseconds. | |
| return new Date((excelDate - (25567 + 2))*86400*1000); | |
| } |
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