diff --git a/.gitattributes b/.gitattributes
index 91f96ccef7..5541a41f1d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -16175,6 +16175,7 @@ tests/test/units/sysutils/twstrcmp.pp svneol=native#text/plain
 tests/test/units/types/ttbitconverter.pp svneol=native#text/pascal
 tests/test/units/ucomplex/tcsqr1.pp svneol=native#text/pascal
 tests/test/units/unix/tepoch1.pp svneol=native#text/pascal
+tests/test/units/unix/ttimezone1.pp svneol=native#text/pascal
 tests/test/units/variants/tcustomvariant.pp svneol=native#text/plain
 tests/test/units/variants/tvararrayofintf.pp svneol=native#text/plain
 tests/test/units/variants/tw26370.pp svneol=native#text/plain
diff --git a/tests/test/units/unix/ttimezone1.pp b/tests/test/units/unix/ttimezone1.pp
new file mode 100644
index 0000000000..ec85e9cf50
--- /dev/null
+++ b/tests/test/units/unix/ttimezone1.pp
@@ -0,0 +1,43 @@
+{ %target=linux,freebsd,openbsd,aix,darwin,netbsd }
+uses
+  BaseUnix,unix;
+
+function GetOffset(Year, Month, Day, Hour, Minute, Second: word; const UTC: Boolean): Integer;
+var
+  UnixTime: Int64;
+  lTZInfo: TTZInfo;
+begin
+  lTZInfo:=Default(TTZInfo);
+  UnixTime:=UniversalToEpoch(Year, Month, Day, Hour, Minute, Second);
+  if not GetLocalTimezone(UnixTime,UTC,lTZInfo) then
+    Halt(1);
+  if not UTC then
+    UnixTime := UnixTime-lTZInfo.seconds;
+  if not ((lTZInfo.validsince<=UnixTime) and (UnixTime<lTZInfo.validuntil)) then
+    Halt(2);
+  if lTZInfo.seconds mod 3600<>0 then
+    Halt(3);
+  Result:=lTZInfo.seconds div 3600;
+end;
+
+begin
+  if not ReadTimezoneFile('Europe/Vienna') then // check against Europe/Vienna file
+  begin
+    writeln('timezone file not found');
+    halt(10);
+  end;
+
+  if GetOffset(2019, 03, 31, 1, 59, 0, False)<>1 then Halt(11);
+  if GetOffset(2019, 03, 31, 3, 0, 0, False)<>2 then Halt(12);
+
+  if GetOffset(2019, 10, 27, 2, 59, 0, False)<>2 then Halt(13);
+  if GetOffset(2019, 10, 27, 3, 0, 0, False)<>1 then Halt(14);
+
+  if GetOffset(2019, 03, 31, 0, 59, 0, True)<>1 then Halt(15);
+  if GetOffset(2019, 03, 31, 1, 0, 0, True)<>2 then Halt(16);
+
+  if GetOffset(2019, 10, 27, 0, 59, 0, True)<>2 then Halt(17);
+  if GetOffset(2019, 10, 27, 1, 0, 0, True)<>1 then Halt(18);
+
+  writeln('ok');
+end.