Learn Farsi: ساعت شش است.

In Farsi, the word ساعت means 'hour', 'clock', or 'watch'. To tell the time, you simply say ساعت followed by the number. So ساعت شش literally means 'hour six', which translates to 'six o'clock'.

Why is the word order ساعت شش ('hour six') and not the other way around?

When stating the time on the clock, the word ساعت always comes before the number. If you put the number first, like شش ساعت, it changes the meaning to a duration: 'six hours'.

Where is the word for 'it' in this sentence?

Farsi usually drops subject pronouns like 'it' because the verb already gives us enough context. Here, the verb است means 'is'. You do not need a separate word at the beginning to say 'It is'.

I've sometimes heard people pronounce the number 6 as 'shish'. Which one is correct for شش?

The formal, written pronunciation of شش is 'shesh'. However, in everyday spoken Farsi, it is extremely common to pronounce it as 'shish'. Both are correct, so you can safely use whichever you find easier!