The term "wee hours" refers to the early hours of the morning, typically between midnight and dawn. However, there are a variety of alternative phrases that can be used to convey the same meaning. These include "small hours," "uncanny hours," "middle of the night," and "early morning hours." Other phrases that can be used to describe the early morning hours include "pre-dawn," "crack of dawn," and "sunrise." It's important to choose the phrase that best fits the context and tone of your writing or conversation, but any of these can work as a synonym for "wee hours".