diff --git a/f259dac74721c00f0184bf45277137771fc747fe.patch b/f259dac74721c00f0184bf45277137771fc747fe.patch
new file mode 100644
index 0000000..ba399ae
--- /dev/null
+++ b/f259dac74721c00f0184bf45277137771fc747fe.patch
@@ -0,0 +1,48 @@
+From 747d4683221b5584f9663695fb48145689b42ceb Mon Sep 17 00:00:00 2001
+From: sebres <info@sebres.de>
+Date: Mon, 4 Jan 2021 02:42:38 +0100
+Subject: [PATCH] fixes century selector of %ExY and %Exy in datepattern for
+ tests, considering interval from 2005 (alternate now) to now; + better
+ grouping algorithm for resulting century RE
+
+---
+ fail2ban/server/strptime.py | 24 ++++++++++++++++++++++--
+ 1 file changed, 22 insertions(+), 2 deletions(-)
+
+diff --git a/fail2ban/server/strptime.py b/fail2ban/server/strptime.py
+index 1464a96d1..39fc79586 100644
+--- a/fail2ban/server/strptime.py
++++ b/fail2ban/server/strptime.py
+@@ -36,10 +36,30 @@ def _getYearCentRE(cent=(0,3), distance=3, now=(MyTime.now(), MyTime.alternateNo
+ 	Thereby respect possible run in the test-cases (alternate date used there)
+ 	"""
+ 	cent = lambda year, f=cent[0], t=cent[1]: str(year)[f:t]
++	def grp(exprset):
++		c = None
++		if len(exprset) > 1:
++			for i in exprset:
++				if c is None or i[0:-1] == c:
++					c = i[0:-1]
++				else:
++					c = None
++					break
++			if not c:
++				for i in exprset:
++					if c is None or i[0] == c:
++						c = i[0]
++					else:
++						c = None
++						break
++			if c:
++				return "%s%s" % (c, grp([i[len(c):] for i in exprset]))
++		return ("(?:%s)" % "|".join(exprset) if len(exprset[0]) > 1 else "[%s]" % "".join(exprset)) \
++			if len(exprset) > 1 else "".join(exprset)
+ 	exprset = set( cent(now[0].year + i) for i in (-1, distance) )
+ 	if len(now) and now[1]:
+-		exprset |= set( cent(now[1].year + i) for i in (-1, distance) )
+-	return "(?:%s)" % "|".join(exprset) if len(exprset) > 1 else "".join(exprset)
++		exprset |= set( cent(now[1].year + i) for i in xrange(-1, now[0].year-now[1].year+1, distance) )
++	return grp(sorted(list(exprset)))
+ 
+ timeRE = TimeRE()
+