The days are getting longer.

白天越来越长了。

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The days are getting longer in summer.

夏天，白昼变长了。

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The days are getting longer and longer.

白天越来越长。

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But city officials point out the days are getting warmer and longer, so any new snow likely won't last long.

WSJ: Winter Seems Eternal in Anchorage, Alaska

Which means, in the Northern Hemisphere what you might call "the getting warmer seasons" spring and summer are collectively seven days longer than "the getting colder seasons, " fall and winter.

NPR: Not All Seasons Are Created Equal