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1 files changed, 10 insertions, 0 deletions

diff --git a/src/node_modules/es-abstract/2015/WeekDay.js b/src/node_modules/es-abstract/2015/WeekDay.js
new file mode 100644
index 0000000..51d0722
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+++ b/src/node_modules/es-abstract/2015/WeekDay.js
@@ -0,0 +1,10 @@
+'use strict';
+
+var Day = require('./Day');
+var modulo = require('./modulo');
+
+// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.6
+
+module.exports = function WeekDay(t) {
+	return modulo(Day(t) + 4, 7);
+};