What day of the week does Mother's day usually occur on?
Mother's Day is typically observed on the second Sunday of May in many countries, including the United States, Canada and Australia.
Complete the following task based on the instruction and optional input provided.### Instruction:
What day of the week does Mother's day usually occur on?

### Output:
Mother's Day is typically observed on the second Sunday of May in many countries, including the United States, Canada and Australia.