Xin Wang

Please do not merge this PR by now, as I find that I do not format years correctly, will investigate it later.

Found that in [Python](https://docs.python.org/3/library/datetime.html#datetime.MINYEAR) year of a datetime object is restricted to between 1 and 9999, and format of calendar dates with year 10000 is not quite clear in [Wikipedia](https://en.wikipedia.org/wiki/ISO_8601#Calendar_dates),...

Btw, as we can not represent dates that before year 1000 in current Self, so those two methods are not fully tested.

[Morph Creation: The Top-down Approach](http://handbook.selflanguage.org/4.5/morphic.html#morph-creation-the-top-down-approach) also says that: > the system will deduce that any slots added to ovalMorph’s traits or prototype should be placed in the same module as...

Do you mean *C-Heap"? It's not very high here, see following screenshot for more detail, which is taken in several minutes before crash: 

According to [Wikipedia](https://en.wikipedia.org/wiki/Year_2038_problem#Solutions): > Linux uses a 64-bit time_t for 64-bit architectures only; the pure 32-bit ABI is not changed due to backward compatibility. It seems that it's not easy...

Just found that [autocutsel](http://www.nongnu.org/autocutsel/) can be used to temporarily bypass this problem, which will sync cut buffer and selection automatically. For a complete solution, we need to update to mechanism...

@doublec, thanks. Can that slot be created automatically? Also, that error message is somewhat opaque.

Do you mean `Visibility: public`? I did not see any bold method names in Linux X11, is that macOS specific?

If I define font alias for `verdana`, `verdanaBold` and `verdanaItalic` in `X11Globals fontFamily`, bold fonts can be displayed correctly. I'd like to file those new slots out, I already set...