Friday

It was a hard day. Tomorrow will be the week end!

Elena, it is common for people who work from Monday to Friday to consider that the weekend starts when work finishes:

<em>"It was a hard day, but now it is the weekend!" or ".. now the weekend has begun!"</em>

Friday

<em>It was a hard day. Tomorrow will be week end!</em>

It's been a hard day. Tomorrow will be the weekend (Or - Tomorrow it's the weekend )