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diff --git a/node_modules/date-fns/esm/startOfYesterday/index.js b/node_modules/date-fns/esm/startOfYesterday/index.js
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+++ b/node_modules/date-fns/esm/startOfYesterday/index.js
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+/**
+ * @name startOfYesterday
+ * @category Day Helpers
+ * @summary Return the start of yesterday.
+ * @pure false
+ *
+ * @description
+ * Return the start of yesterday.
+ *
+ * > ⚠️ Please note that this function is not present in the FP submodule as
+ * > it uses `new Date()` internally hence impure and can't be safely curried.
+ *
+ * @returns {Date} the start of yesterday
+ *
+ * @example
+ * // If today is 6 October 2014:
+ * const result = startOfYesterday()
+ * //=> Sun Oct 5 2014 00:00:00
+ */
+export default function startOfYesterday() {
+  var now = new Date();
+  var year = now.getFullYear();
+  var month = now.getMonth();
+  var day = now.getDate();
+  var date = new Date(0);
+  date.setFullYear(year, month, day - 1);
+  date.setHours(0, 0, 0, 0);
+  return date;
+}
+\ No newline at end of file