UsageFollowing Online Cambridge Dictionary, this idiom is used to express earlier than a particular moment.
Please note that we do require a couple of weeks notice to have an interview scheduled so it is always best to have these scheduled ahead of time.
Let's meet for lunch. I'll call you ahead of time to decide exactly when and where.
The repairs to the road were finished two weeks ahead of time (= sooner than was expected).
Looking the text in the picture, it means that there are several freezer meals that we just cook them at the time of eating.
Look at the category of ahead of time of a magazine, the writings in this group are talking about innovative and cutting-edge technologies. It means that they are new and go earlier than the current moment.
Next, I am going to share my discoveries with you. I have searched images of this idiom at the website shutterstock. Frankly, the results show images involving in the future as well as the next things.
What's next? Hurry Up! Faster! Ahead... Summer Just Ahead. Crisis Ahead! Forward Arrow...
Variants5 years head of any other phone: năm năm tới của bất kì điện thoại nào
a head of your time: not meaning the earlier than a special moment. But it also concerns in the things/ideas happening before at the present. It is used to express having very modern ideas. We could see the cartoons and comics about this idiom via the link I have just put.
He was way ahead of his time in realizing the importance of being able to record sound.