Looking on the internet deeply has found these results:

I'll call you in the evening is the most popular phrase on the web.

I'll call you at evening 10 results on the web	I'll call you in the evening 1235,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	That public service would be one hour of air time set aside every night for informational broadcasting, or what we now call the evening news. That public service would be one hour of air time set aside every night for informational broadcasting, or what we now call the evening news. My agency got a call this evening. When the muezzin call evening prayer from the minaret and all the faithful, they bow toward Mecca. You know, he's allowed to make calls in the evening, so I've been talking to him. Did she call you during the evening or the night? Just leave me a message, and I always return those calls in the evening, after dinner. I'll call you this evening.

I'll call you at evening

10 results on the web

I'll call you in the evening

1235,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

That public service would be one hour of air time set aside every night for informational broadcasting, or what we now call the evening news.
That public service would be one hour of air time set aside every night for informational broadcasting, or what we now call the evening news.
My agency got a call this evening.
When the muezzin call evening prayer from the minaret and all the faithful, they bow toward Mecca.
You know, he's allowed to make calls in the evening, so I've been talking to him.
Did she call you during the evening or the night?
Just leave me a message, and I always return those calls in the evening, after dinner.
I'll call you this evening.