README.md in japanese_calendar-0.4.1 vs README.md in japanese_calendar-0.4.2

@@ -38,10 +38,20 @@
 Time.new(1926, 12, 25).era_name(:romaji) # => "Showa"
 Time.new(1912,  7, 30).era_name(:romaji) # => "Taisho"
 Time.new(1873,  1,  1).era_name(:romaji) # => "Meiji"
 ```
 
+The following examples show how to check the Japanese era:
+
+```
+Time.new(2019,  5,  1).reiwa?  # => true
+Time.new(1989,  1,  8).heisei? # => true
+Time.new(1926, 12, 25).showa?  # => true
+Time.new(1912,  7, 30).taisho? # => true
+Time.new(1873,  1,  1).meiji?  # => true
+```
+
 You can convert to a Japanese year with the `era_year` method:
 
 ```
 Time.new(2019,  5,  1).era_year # => 1
 Time.new(2019,  4, 30).era_year # => 31
@@ -55,9 +65,10 @@
 ```
 time = Time.new(2019, 5, 1)
 
 # Japanese era
 time.strftime("%JN")  # => "令和"
+time.strftime("%Jn")  # => "令"
 time.strftime("%JR")  # => "Reiwa"
 time.strftime("%^JR") # => "REIWA"
 time.strftime("%Jr")  # => "R"
 time.strftime("%Jy")  # => "01"
 time.strftime("%-Jy") # => "1"