First an example; just to make clear what I'm referring to.
He wrote a note on the calendar, that he might remember to call his friend on his birthday.
Meaning:
He wrote a note on the calendar, in order to remember to call his friend on his birthday.
I remember having seen this usage somewhere, but I just wanted to make sure that it was actually correct, or commonly used.
The first is an older variant of so that. It is rarely used in contemporary spoken or written English.
A contemporary speaker is mostly likely to encounter it at church or in a religious text full of archaisms and formulaic phrases
For example:
That they might be saved, He sent ...
Today it is in an elevated register, so it might be used in a brochure, say, seeking to strike a tone of refined elegance and long-standing tradition:
That our guests might enjoy their stay in unparalleled luxury, the hotel has not just one but two Michelin three-star restaurants to choose from.
