Meaning?

[Cut!e P!e]

Anne Boleyn: [on Mary's wedding night] I failed you as a sister.
Mary Boleyn: No one could wish for a better sister.


What do they mean?


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And here's another conversation on a celebration of a new year in some country:
A: *name of the coountry* is living in the dark ages, I think its something like 1361 or some crap like that this year.
B(correcting A): It's 1387!
A:My bad, party like its 1399.

What's the joke behind the last line? Is it some famous sentence or joke that person A using here?

Thanks

[heidita]

Anne Boleyn: [on Mary's wedding night] I failed you as a sister. I wasn't a good sister to you
Mary Boleyn: No one could wish for a better sister. You are mistaken, i think you have been a very good sister indeed.

[heidita]

A:My bad, party like its 1399.

What's the joke behind the last line? Is it some famous sentence or joke that person A using here?

Thanks

As it appears, there is an album which came out some time ago:


Bagas Degol, Party like it's 1399

The complete title is:

Tonight We're Going To Party Like It's 1399

Party used here as a verb: to party, to celebrate.

[Cut!e P!e]

Thank you very much!