I was wondering if this chapter was set around American Thanksgiving with the "American-style" turkey and Haruka planning the New Year's meal, which seems a little weird since I think this manga is generally in sync with real world seasons (unlike, say, WataMote), but the talk about Kana already forgetting her New Year's resolutions makes me think it's set in late February/early March (whenever this chapter was published in Japan).
I guess Haruka is just the type to already start planning her New Year's meal ten months early.
CORRECTION: This chapter was published on December 26th so the New Year's dinner planning makes a lot more sense.