Do you know? vs Did you Know?

[Ganesh]

Do you know? vs Did you Know?
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Did you know?
Family fare deal

When at least one fare paying adult travels with more than one child, the first child travels at the child fare and the remaining children from the same faimly are entitled to free travel. This includes day tripper and city hopper tickets

Why they use 'Did you know' instead of 'Do you know'

[Kitosdad]

Why they use 'Did you know' instead of 'Do you know'

The first is asking for confirmation that you already knew ( I suppose you already knew. )

The second is imparting the fact. ( I'm telling you, as I presume you don't know. )
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Keep it simple ... Keep it interesting.

[Ganesh]

Excellent answer :Thank you

Did you know I always think to thank you every answer some times I miss them

Ganesh