The phrase "about time" typically conveys a sense of relief or urgency for something to happen. Some synonyms for "about time" include high time, overdue, at long last, finally, past due, and just in time. These words all indicate some level of anticipation or waiting for a certain event or action. Other options might include "time is ripe," "it's about time for," or "long awaited." These phrases can be useful for adding emphasis or variety to your writing, particularly when discussing situations where something needed to happen or change. By choosing the right synonym for "about time," you can convey the appropriate tone and mood for your message.