diff --git a/src/strptime.cpp b/src/strptime.cpp
index da513a1..e923ee4 100644
--- a/src/strptime.cpp
+++ b/src/strptime.cpp
@@ -1,233 +1,23 @@
 /*
  * Polyfill for strptime function
  *
- * This source code is from musl library, located at https://git.musl-libc.org/cgit/musl/tree/src/time/strptime.c .
+ * This source code is from https://gist.github.com/jeremyfromearth/5694aa3a66714254752179ecf3c95582 .
  */
 
-/*
- * musl as a whole is licensed under the following standard MIT license:
- * 
- * ----------------------------------------------------------------------
- * Copyright © 2005-2020 Rich Felker, et al.
- * 
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- * 
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- * ----------------------------------------------------------------------
- */
+#include <iostream>
+#include <time.h>
+#include <iomanip>
+#include <sstream>
 
 #include "strptime.h"
 
 char* strptime(const char* s, const char* f, struct tm* tm)
 {
-	int i, w, neg, adj, min, range, *dest, dummy;
-	const char *ex;
-	size_t len;
-	int want_century = 0, century = 0, relyear = 0;
-	while (*f) {
-		if (*f != '%') {
-			if (isspace(*f)) for (; *s && isspace(*s); s++);
-			else if (*s != *f) return 0;
-			else s++;
-			f++;
-			continue;
-		}
-		f++;
-		if (*f == '+') f++;
-		if (isdigit(*f)) {
-			char *new_f;
-			w=strtoul(f, &new_f, 10);
-			f = new_f;
-		} else {
-			w=-1;
-		}
-		adj=0;
-		switch (*f++) {
-		case 'a': case 'A':
-			dest = &tm->tm_wday;
-			min = ABDAY_1;
-			range = 7;
-			goto symbolic_range;
-		case 'b': case 'B': case 'h':
-			dest = &tm->tm_mon;
-			min = ABMON_1;
-			range = 12;
-			goto symbolic_range;
-		case 'c':
-			s = strptime(s, nl_langinfo(D_T_FMT), tm);
-			if (!s) return 0;
-			break;
-		case 'C':
-			dest = &century;
-			if (w<0) w=2;
-			want_century |= 2;
-			goto numeric_digits;
-		case 'd': case 'e':
-			dest = &tm->tm_mday;
-			min = 1;
-			range = 31;
-			goto numeric_range;
-		case 'D':
-			s = strptime(s, "%m/%d/%y", tm);
-			if (!s) return 0;
-			break;
-		case 'H':
-			dest = &tm->tm_hour;
-			min = 0;
-			range = 24;
-			goto numeric_range;
-		case 'I':
-			dest = &tm->tm_hour;
-			min = 1;
-			range = 12;
-			goto numeric_range;
-		case 'j':
-			dest = &tm->tm_yday;
-			min = 1;
-			range = 366;
-			adj = 1;
-			goto numeric_range;
-		case 'm':
-			dest = &tm->tm_mon;
-			min = 1;
-			range = 12;
-			adj = 1;
-			goto numeric_range;
-		case 'M':
-			dest = &tm->tm_min;
-			min = 0;
-			range = 60;
-			goto numeric_range;
-		case 'n': case 't':
-			for (; *s && isspace(*s); s++);
-			break;
-		case 'p':
-			ex = nl_langinfo(AM_STR);
-			len = strlen(ex);
-			if (!strncasecmp(s, ex, len)) {
-				tm->tm_hour %= 12;
-				s += len;
-				break;
-			}
-			ex = nl_langinfo(PM_STR);
-			len = strlen(ex);
-			if (!strncasecmp(s, ex, len)) {
-				tm->tm_hour %= 12;
-				tm->tm_hour += 12;
-				s += len;
-				break;
-			}
-			return 0;
-		case 'r':
-			s = strptime(s, nl_langinfo(T_FMT_AMPM), tm);
-			if (!s) return 0;
-			break;
-		case 'R':
-			s = strptime(s, "%H:%M", tm);
-			if (!s) return 0;
-			break;
-		case 'S':
-			dest = &tm->tm_sec;
-			min = 0;
-			range = 61;
-			goto numeric_range;
-		case 'T':
-			s = strptime(s, "%H:%M:%S", tm);
-			if (!s) return 0;
-			break;
-		case 'U':
-		case 'W':
-			/* Throw away result, for now. (FIXME?) */
-			dest = &dummy;
-			min = 0;
-			range = 54;
-			goto numeric_range;
-		case 'w':
-			dest = &tm->tm_wday;
-			min = 0;
-			range = 7;
-			goto numeric_range;
-		case 'x':
-			s = strptime(s, nl_langinfo(D_FMT), tm);
-			if (!s) return 0;
-			break;
-		case 'X':
-			s = strptime(s, nl_langinfo(T_FMT), tm);
-			if (!s) return 0;
-			break;
-		case 'y':
-			dest = &relyear;
-			w = 2;
-			want_century |= 1;
-			goto numeric_digits;
-		case 'Y':
-			dest = &tm->tm_year;
-			if (w<0) w=4;
-			adj = 1900;
-			want_century = 0;
-			goto numeric_digits;
-		case '%':
-			if (*s++ != '%') return 0;
-			break;
-		default:
-			return 0;
-		numeric_range:
-			if (!isdigit(*s)) return 0;
-			*dest = 0;
-			for (i=1; i<=min+range && isdigit(*s); i*=10)
-				*dest = *dest * 10 + *s++ - '0';
-			if ((unsigned)(*dest - min) >= (unsigned)range) return 0;
-			*dest -= adj;
-			switch((char *)dest - (char *)tm) {
-			case offsetof(struct tm, tm_yday):
-				;
-			}
-			goto update;
-		numeric_digits:
-			neg = 0;
-			if (*s == '+') s++;
-			else if (*s == '-') neg=1, s++;
-			if (!isdigit(*s)) return 0;
-			for (*dest=i=0; i<w && isdigit(*s); i++)
-				*dest = *dest * 10 + *s++ - '0';
-			if (neg) *dest = -*dest;
-			*dest -= adj;
-			goto update;
-		symbolic_range:
-			for (i=0; i < range; i++) {
-				ex = nl_langinfo(min+i);
-				len = strlen(ex);
-				if (strncasecmp(s, ex, len)) continue;
-				s += len;
-				*dest = i % range;
-				break;
-			}
-			if (i<0) return 0;
-			goto update;
-		update:
-			//FIXME
-			;
-		}
-	}
-	if (want_century) {
-		tm->tm_year = relyear;
-		if (want_century & 2) tm->tm_year += century * 100 - 1900;
-		else if (tm->tm_year <= 68) tm->tm_year += 100;
-	}
-	return (char *)s;
+    std::istringstream input(s);
+    input.imbue(std::locale(setlocale(LC_ALL, nullptr)));
+    input >> std::get_time(tm, f);
+    if (input.fail()) {
+        return nullptr;
+    }
+    return (char*)(s + input.tellg());
 }