CZ > EN je jedno

I read the following and don't understand what it means. Can somebody please help?

Je jedno, že...

Díky předem.

 

It is one that...

But really needs context - could be several things.

 

The context is speaking about receiving a letter in the mail.

Je jedno, jestli 18.6 nebo později, hlavně aby přisel v pořádku.

 

To me it sound like "It does not matter", "No preference", "Either way" etc.

 

So the sentence means:

Je jedno, jestli 18.6 nebo později, hlavně aby přisel v pořádku.

It does not matter if he comes on 18.6. as long as he comes in one piece/he is safe.

 

Thanks. Now it makes sense.

 

to rsalc1: sorry, I overlooked one part of the sentence. So again, the translation is:

It does not matter if he comes on 18.6. or later as long as he comes in one piece.