Created
May 24, 2012 16:40
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Convert Excel date values to JavaScript date objects
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| // 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 + 1))*86400*1000); | |
| } |
You're a legend! Much appreciated!
By the way, I also had to adjust the value to 2 days such as: new Date((excelDate - (25567 + 2))_86400_1000)
What should be the excel field format? I tried with date format but get error as "The left-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type.ts(2362)".
Also, text format did not help. Number format is not readable to user.
legend!
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const { getJsDateFromExcel } = require("excel-date-to-js")getJsDateFromExcel(dateFieldFromExcelFile)