irb(main):001:0> Time.parse("16:30")
	NoMethodError: undefined method `parse' for Time:Class

Also rfc2822(), httpdate() and xmlschema(date) raises this error.

Solution: require the time.rb: require ‘time’

This is not a bug. It’s because they are not core (But Time class is). Some implementation may auto require for you. But if you get this error, just try to require it.

Reference 1, 2

==Traditional Chinese version==

呼叫Time.parse時得到undefined method錯誤？

	irb(main):001:0> Time.parse("16:30")
	NoMethodError: undefined method `parse' for Time:Class

rfc2822(), httpdate() and xmlschema(date) 也會爆這個錯誤

解決方法： require time.rb: require ‘time’

這不是bug，這是因為這些methods不是core(但Time class本身是)，有些implementation可能會自動幫你require，但如果你遇到這個error，就試試看require ‘time’

參考來源 1, 2