diff --git a/cal.rb b/cal.rb
new file mode 100644
index 0000000..94c0c1e
--- /dev/null
+++ b/cal.rb
@@ -0,0 +1,32 @@
+require 'date'
+
+time = Time.now.localtime
+year = time.year.to_i
+month = time.month.to_i
+currentday = time.day  # 現在日
+startwday = Date.new(year,month,1).wday # その月の最初の曜日
+endmonth = Date.new(year,month,-1) # その月の日数
+endwday = time.wday # その月の最後の曜日
+
+
+a = Date.new(2024, 3, 6)
+puts  "\t#{a.month}月\s#{a.year}"
+b = %w(日 月 火 水 木 金 土)
+b.each do |week|
+  print "\s#{week}"
+end
+days = (1..31).to_a
+days.each do |day|
+  if day == 1
+    print "\n\s\s#{day}"
+  elsif day % 7 == 0 && day != 7
+    print "\s#{day}\n"
+  elsif day == 7
+    print "\s\s#{day}\n"
+  elsif day >= 10
+    print "\s#{day}"
+  else
+    print "\s\s#{day}"
+  end
+end
+