Glossary term: 国际日期变更线
Description: 国际日期变更线是一条特定的子午线，大致沿着经度 180° 的子午线。国际日期变更线自北向南穿过俄罗斯与阿拉斯加之间，穿过包括密克罗尼西亚和波利尼西亚部分地区的太平洋，以及澳大利亚/新西兰东部，最后到达南极洲的南极点。国际日期变更线标志着日历日期变化一天的边界。因此，国际日期变更线以西的地区比以东的地区早一天。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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