Nintendo Ds Professor Layton & Pandora's Box

[Handbaglady]

I'm hoping someone out there can help me with the puzzle 'The Wrong Date'
Clue is Dropstone was founded 50 years ago, and the founders commissioned a stone sculpture to commerate that day. Unfortunately the dozy sculptor managed to engrave the wrong date onto it. The whole village had to live with the erroneous sculpture until some bright spark realised that converting is in a certain way would enable the correst date to be displayed. Think about what the sculpture could have been converted into in order to display the correct date. On which date was Dropstone founded? Answer in four digits (DD/MM)
Futher hints are: (1) The puzzle text tells you that the sculptor engraved the wrong date into the stone, so you know that 12-8 isn't the date Dropstone was founded. (2) Does the sculpture's shape give you a clue into what it could have been converted? That big bowl and the opening at the top should indicate that this sculpture is now a fountain. (3) Though currently dry, the fountain's big bowl is usually filled with water. Why don't you take a moment to...reflect on this?
Any help would be greatly appreciated as this has been driving me mad since last Thursday. Thank you

[auntflo]

it's 13/8
when it's working as a fountain, the water comes up to the level of halfway up the numbers. the top halves of the numbers are reflected in the water, to look like 13/8.