Japanese calendar conversion mistakenly recognizes 0年 as 元年

[SaltfishAmi]

I think this can be very confusing since 元年 is 1年, and we want to avoid mistaking it as 0年.

[birtles]

Yes, that's a bug. Out of curiosity, did you find content that has 明治０年 in it?

[SaltfishAmi]

I think I once found something like 明治0 not necessarily with the 年 suffixed, but still triggered the date conversion