Examples: -42.15:11:36.457 (45 days, 15 hours, 11 minutes, 36.457 seconds in the past) +42.15:11:36.457 (45 days, 15 hours, 11 minutes, 36.457 seconds in the future) +15:11:36.457 (15 hours, 11 minutes, 36.457 seconds in the future) +00:11:36.457 (11 minutes, 36.457 seconds in the future) +00:00:36.457 (36.457 seconds in the future) String representation.