looking for an idiom

[Anatoly]

Hi, there!
May I ask you a slightly unusual question?
There is an idiom in my native language. It could be translated into English literally as “Friday comes seven times a week” or “Seven Fridays a week” (I’m not sure). We say that about a person who frequently changes his decisions or opinion.
I wonder, if there’s in English any expression for such kind of behavior?
Thanks!

 

[RonBee]

Here are a couple.

For a person:
"He was as changeable as a chameleon."

For opinions:
"His opinions were as changeable as the weather."

His mind was as changeable as spring weather.
http://www.geocities.com/helen_cs_1999/idioms.html

8)

 

[Anatoly]

Here are a couple.

For a person:
"He was as changeable as a chameleon."

For opinions:
"His opinions were as changeable as the weather."

His mind was as changeable as spring weather.
http://www.geocities.com/helen_cs_1999/idioms.html

8)

Thank you very much!

 

[RonBee]

Thank you very much!

Any time.

Welcome to the forum.

8)