Telling the time in Spanish is just one more thing we need to teach, no matter which curriculum you are following, at early stages.
I've put together this post compiling a lot of materials and resources to teach this specific topic for starters'=beginners' classes.
Click here to access all these resources
If you are more into hands-on activity, I'd recommend to bring in a hula hoop and make a clock with it on the board or on the floor and play with time.
One thing I've learnt over the years is that the more times you re-visit something the easier for your students to internalize the content. Telling the time is one of those things you can find everywhere, and so, it should be something you re-visit every single class (or week or month). Also, you can review it integrating the time into different activities.