こんなことを説明する日が来るとはって英語でなんて言うの？

"こんなことを説明する日が来るとは" - To think a day would come where I would have to explain something like this. - To think I would have to explain something like this. レコードにはA面とB面とがあってね… - So you see, records have an A-side and a B-side... こんなことを説明する日が来るとは（こんなことをわざわざ説明するなんて…）。 - To think a day would come where I would have to explain something like this...