diff --git a/po/pl.po b/po/pl.po
index ec4a6b4e9..e8074261d 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -10,8 +10,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gnome-shell\n"
 "Report-Msgid-Bugs-To: https://gitlab.gnome.org/GNOME/gnome-shell/issues\n"
-"POT-Creation-Date: 2018-02-06 01:15+0000\n"
-"PO-Revision-Date: 2018-02-08 01:30+0100\n"
+"POT-Creation-Date: 2018-02-08 16:48+0000\n"
+"PO-Revision-Date: 2018-02-08 23:59+0100\n"
 "Last-Translator: Piotr Drąg <piotrdrag@gmail.com>\n"
 "Language-Team: Polish <community-poland@mozilla.org>\n"
 "Language: pl\n"
@@ -716,7 +716,7 @@ msgid "Settings"
 msgstr "Ustawienia"
 
 #. Translators: Enter 0-6 (Sunday-Saturday) for non-work days. Examples: "0" (Sunday) "6" (Saturday) "06" (Sunday and Saturday).
-#: js/ui/calendar.js:47
+#: js/ui/calendar.js:44
 msgctxt "calendar-no-work"
 msgid "06"
 msgstr "06"
@@ -726,47 +726,70 @@ msgstr "06"
 #. * NOTE: These grid abbreviations are always shown together
 #. * and in order, e.g. "S M T W T F S".
 #.
-#: js/ui/calendar.js:76
+#: js/ui/calendar.js:73
 msgctxt "grid sunday"
 msgid "S"
 msgstr "N"
 
 #. Translators: Calendar grid abbreviation for Monday
-#: js/ui/calendar.js:78
+#: js/ui/calendar.js:75
 msgctxt "grid monday"
 msgid "M"
 msgstr "P"
 
 #. Translators: Calendar grid abbreviation for Tuesday
-#: js/ui/calendar.js:80
+#: js/ui/calendar.js:77
 msgctxt "grid tuesday"
 msgid "T"
 msgstr "W"
 
 #. Translators: Calendar grid abbreviation for Wednesday
-#: js/ui/calendar.js:82
+#: js/ui/calendar.js:79
 msgctxt "grid wednesday"
 msgid "W"
 msgstr "Ś"
 
 #. Translators: Calendar grid abbreviation for Thursday
-#: js/ui/calendar.js:84
+#: js/ui/calendar.js:81
 msgctxt "grid thursday"
 msgid "T"
 msgstr "C"
 
 #. Translators: Calendar grid abbreviation for Friday
-#: js/ui/calendar.js:86
+#: js/ui/calendar.js:83
 msgctxt "grid friday"
 msgid "F"
 msgstr "P"
 
 #. Translators: Calendar grid abbreviation for Saturday
-#: js/ui/calendar.js:88
+#: js/ui/calendar.js:85
 msgctxt "grid saturday"
 msgid "S"
 msgstr "S"
 
+#. *
+#. * Translators: The header displaying just the month name
+#. * standalone, when this is a month of the current year.
+#. * "%OB" is the new format specifier introduced in glibc 2.27,
+#. * in most cases you should not change it.
+#.
+#: js/ui/calendar.js:382
+msgid "%OB"
+msgstr "%OB"
+
+#. *
+#. * Translators: The header displaying the month name and the year
+#. * number, when this is a month of a different year.  You can
+#. * reorder the format specifiers or add other modifications
+#. * according to the requirements of your language.
+#. * "%OB" is the new format specifier introduced in glibc 2.27,
+#. * in most cases you should not use the old "%B" here unless you
+#. * absolutely know what you are doing.
+#.
+#: js/ui/calendar.js:392
+msgid "%OB %Y"
+msgstr "%OB %Y"
+
 #: js/ui/calendar.js:449
 msgid "Previous month"
 msgstr "Poprzedni miesiąc"
@@ -1514,11 +1537,11 @@ msgstr "Środowisko GNOME musi zablokować ekran"
 #.
 #. XXX: another option is to kick the user into the gdm login
 #. screen, where we're not affected by grabs
-#: js/ui/screenShield.js:836 js/ui/screenShield.js:1308
+#: js/ui/screenShield.js:836 js/ui/screenShield.js:1311
 msgid "Unable to lock"
 msgstr "Nie można zablokować"
 
-#: js/ui/screenShield.js:837 js/ui/screenShield.js:1309
+#: js/ui/screenShield.js:837 js/ui/screenShield.js:1312
 msgid "Lock was blocked by an application"
 msgstr "Blokowanie zostało zablokowane przez program"