Man pages matching name gearman_task_attr_init_epoch in section 3:

gearman_task_attr_init_epoch.3.en	debian 10 / libgearman-dev
gearman_task_attr_init_epoch.3.en	debian 11 / libgearman-dev
gearman_task_attr_init_epoch.3.en	debian 12 / libgearman-dev