There are several synonyms for the phrase "before the usual/arranged/expected time," depending on the context in which it is being used. Some of these include "ahead of schedule," "early," "premature," "untimely," "in advance," and "by surprise." Each of these words conveys a slightly different meaning or connotation, but all of them indicate that something is happening earlier than anticipated. For example, if a project is completed ahead of schedule, it means that it was finished earlier than the original deadline. Using synonyms like these can help to add variety to your writing and make it more engaging and interesting to read.