The release date was in fact delayed until April 7, setting a pattern.
Manga Integra: What was that for?
Alucard: It’s St. Patrick’s Day and you’re not wearing green. Therefore, according to the Police Girl, I have every right to pinch you.
Integra: I don’t have time to deal with you right now, Alucard. The second Hellsing manga volume comes out in English today, so I’m a little busy. Go pinch the anime version of me, or something.
Alucard: I can’t do that.
Integra: And why not?
Alucard: Because she always wears green.
Anime Integra; There are advantages to being in color.