The iconic Mary Poppins statue in Glebe Park has done a switch-aroo with Mary now facing the Bradman Museum rather than Bowral and District Hospital.

The hospital has been in Mary's line of sight since late last year, but a change in heart, or perhaps a change in seasons, has seen Mary switch sides again.

There is speculation the rotation has coincided with the equinox, which happens twice a year, in late March and late September. An equinox is when day and night are exactly the same length - 12 hours - all over the world.

The two equinoxes signify a change in seasons, with one in autumn and one in spring.

However, Mary's timing seems a bit off this time.

Another theory places the onus on Mary Poppins herself, as there was debate about which direction the statue should face when first placed in the park. Whatever the reason, it keeps residents puzzled pondering the mystery.