LibCore: Support (and use) DateTime string formatting of the form %Z

This formats the time zone name. This is now used in the default format
string because DateTime is meant to represent local time; it only makes
sense to include the time zone by default now that we support non-UTC.

2 files changed, 4 insertions, 1 deletions

diff --git a/Userland/Libraries/LibCore/DateTime.cpp b/Userland/Libraries/LibCore/DateTime.cpp
index 490a27d2f6..dce43d57b5 100644
--- a/Userland/Libraries/LibCore/DateTime.cpp
+++ b/Userland/Libraries/LibCore/DateTime.cpp
@@ -246,6 +246,9 @@ String DateTime::to_string(const String& format) const
 
                 format_time_zone_offset(true);
                 break;
+            case 'Z':
+                builder.append(tzname[0]);
+                break;
             case '%':
                 builder.append('%');
                 break;
diff --git a/Userland/Libraries/LibCore/DateTime.h b/Userland/Libraries/LibCore/DateTime.h
index 30ac5227af..628dd7e343 100644
--- a/Userland/Libraries/LibCore/DateTime.h
+++ b/Userland/Libraries/LibCore/DateTime.h
@@ -30,7 +30,7 @@ public:
     bool is_leap_year() const;
 
     void set_time(int year, int month = 1, int day = 1, int hour = 0, int minute = 0, int second = 0);
-    String to_string(const String& format = "%Y-%m-%d %H:%M:%S") const;
+    String to_string(const String& format = "%Y-%m-%d %H:%M:%S %Z") const;
 
     static DateTime create(int year, int month = 1, int day = 1, int hour = 0, int minute = 0, int second = 0);
     static DateTime now();