Happy New Year!With the compliments of the Zuiun!
The joke is having the final two kanji of 謹賀新年, the four character idiom for 'Happy New Year' (rather formal), replaced with 瑞雲 'Zuiun'.Nagato-san!
You can give me my New Year's money now!E1 Boss
Abyssal Nimbus Hime...I have the feeling we're forgetting something...I'll be doing my best as the shipgirl's engineer, too!...all the best for this year also.Yeah... that's kinda...Just when in the hell are they going tocome to the damn event map!?I'm coming to see you now.Man, it ticked over into 2019 while we were all bustling about, didn't it?Anyway, let's go hard in next year as always!Hmph... Make yourself smaller and come again, Akagi.