From f95329421078d91914c8399cfc8501b80f1f77a2 Mon Sep 17 00:00:00 2001 From: juanii Date: Fri, 12 May 2023 15:25:37 -0300 Subject: [PATCH] Fixes #2942. --- xlsx.js | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/xlsx.js b/xlsx.js index ccbd3dd..2616f1b 100644 --- a/xlsx.js +++ b/xlsx.js @@ -3269,10 +3269,12 @@ function evert_arr(obj) { return o; } -var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000 +var basedate = new Date(1899, 11, 31, 0, 0, 0); // 2209075200000 +var base1904 = new Date(1900, 2, 1, 0, 0, 0); function datenum(v, date1904) { var epoch = v.getTime(); - if(date1904) epoch -= 1462*24*60*60*1000; + if(date1904) epoch -= 1461*24*60*60*1000; + else if(v >= base1904) epoch += 24*60*60*1000; var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000; return (epoch - dnthresh) / (24 * 60 * 60 * 1000); } -- 2.34.1