The antonyms for the phrase "am tardy" can be found in a variety of words and phrases, all of which serve to describe punctuality and timeliness. The most immediate antonym for "am tardy" is "am punctual," which conveys a person's ability to arrive on time and stay on schedule. Other antonyms include "am early," "am ahead of schedule," and "am prompt," all of which convey an impression of a consistently punctual and responsible person. In contrast to these antonyms, "am tardy" implies a certain level of lateness or unreliability, qualities that are not typically associated with strong work ethic and personal responsibility.