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diff --git a/src/libs/3rdparty/botan/src/lib/utils/calendar.h b/src/libs/3rdparty/botan/src/lib/utils/calendar.h
new file mode 100644
index 0000000000..83759070b8
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+++ b/src/libs/3rdparty/botan/src/lib/utils/calendar.h
@@ -0,0 +1,91 @@
+/*
+* Calendar Functions
+* (C) 1999-2009,2015 Jack Lloyd
+* (C) 2015 Simon Warta (Kullo GmbH)
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CALENDAR_H_
+#define BOTAN_CALENDAR_H_
+
+#include <botan/types.h>
+#include <chrono>
+#include <string>
+
+namespace Botan {
+
+/**
+* Struct representing a particular date and time
+*/
+class BOTAN_PUBLIC_API(2,0) calendar_point
+   {
+   public:
+
+      /** The year */
+      uint32_t get_year() const { return year; }
+
+      /** The month, 1 through 12 for Jan to Dec */
+      uint32_t get_month() const { return month; }
+
+      /** The day of the month, 1 through 31 (or 28 or 30 based on month */
+      uint32_t get_day() const { return day; }
+
+      /** Hour in 24-hour form, 0 to 23 */
+      uint32_t get_hour() const { return hour; }
+
+      /** Minutes in the hour, 0 to 60 */
+      uint32_t get_minutes() const { return minutes; }
+
+      /** Seconds in the minute, 0 to 60, but might be slightly
+      larger to deal with leap seconds on some systems
+      */
+      uint32_t get_seconds() const { return seconds; }
+
+      /**
+      * Initialize a calendar_point
+      * @param y the year
+      * @param mon the month
+      * @param d the day
+      * @param h the hour
+      * @param min the minute
+      * @param sec the second
+      */
+      calendar_point(uint32_t y, uint32_t mon, uint32_t d, uint32_t h, uint32_t min, uint32_t sec) :
+         year(y), month(mon), day(d), hour(h), minutes(min), seconds(sec) {}
+
+      /**
+      * Returns an STL timepoint object
+      */
+      std::chrono::system_clock::time_point to_std_timepoint() const;
+
+      /**
+      * Returns a human readable string of the struct's components.
+      * Formatting might change over time. Currently it is RFC339 'iso-date-time'.
+      */
+      std::string to_string() const;
+
+   BOTAN_DEPRECATED_PUBLIC_MEMBER_VARIABLES:
+      /*
+      The member variables are public for historical reasons. Use the get_xxx() functions
+      defined above. These members will be made private in a future major release.
+      */
+      uint32_t year;
+      uint32_t month;
+      uint32_t day;
+      uint32_t hour;
+      uint32_t minutes;
+      uint32_t seconds;
+   };
+
+/**
+* Convert a time_point to a calendar_point
+* @param time_point a time point from the system clock
+* @return calendar_point object representing this time point
+*/
+BOTAN_PUBLIC_API(2,0) calendar_point calendar_value(
+   const std::chrono::system_clock::time_point& time_point);
+
+}
+
+#endif