What does it mean to attend every other day on the recruitment website?

Attendance every other day is very common in the recruitment of supermarket promoters or shop assistants. The standard working month is 8 hours a day, 5 days a week (generally 9 hours, lunch break takes up 1 hour, excluding working hours), generally 22 days a month, and * * * is 176 hours. Every other day is usually the day before, but the working time is generally 13 hours. 8 ~ 2 1 or 9 ~ 22 (similarly, lunch break takes up 1 hour, excluding working hours), 15 days per month, which is basically about 180 hours per month.