123456789 – a magic day tomorrow

DID you know that tomorrow, mathematically, is a once-only date numerically speaking (I’m sure there’s a special name for this ??)

At 12.34 and 56 seconds, on the 7th day of the 8th month, in the year two thousand and 9, it will be: 123456789 !! Mark the moment

Can you work out when such a sequence of numbers will appear again??