Huh? When a leap second is added, a day has 86401 seconds, but time_t says it has only 86400. So the true number of seconds since the epoch drifts from time_t

Huh? When a leap second is added, a day has 86401 seconds, but time_t says it has only 86400. So the true number of seconds since the epoch drifts from time_t every time a leap second is added.