时间测量本质上具有任意性，受到文化、宗教、经济和技术因素的深刻影响[1]。从农业社会基于自然周期的时间追踪，到工业革命推动的标准化制度，再到当代围绕时区的政治争议，人类对时间的定义始终反映着权力关系与政治意图。
时间制度的现代化进程由经济需求驱动。美国铁路协会于1883年11月18日宣布实施四时区制度[1]，为全国铁路运营建立统一标准。工业化深刻改变了人们对时间的认知方式[1]。国际层面，1884年的国际会议选定穿过英国格林威治的本初子午线[1]，确立了全球时间坐标的权力中心。这些看似技术性的决定，实际上都是权力与政治的体现。
当代时区问题依然具有高度的政治性。中国虽然地跨5000公里以上，但官方仅采用单一时区——北京时间，这是1949年共产党执政后作为国家统一形式而制定的[1]。在美国，众议院曾以压倒性多数通过立法，呼吁将夏令时转变为全年制度[1]。然而，美国在1970年代曾尝试全年实施夏令时，但因不受欢迎而短命[1]，说明时间政策的推行面临复杂的社会阻力。波士顿大学政治学教授伊丽莎白·科恩指出："每一项时间测量都是任意的"[1]，这一论述深刻揭示了看似客观的时间制度背后的主观性与权力性质。
Time measurement is fundamentally arbitrary and has always been shaped by culture, religion, economics, and technology [1]. From agricultural societies that tracked time according to natural rhythms to the standardized systems imposed during industrialization, the way humans organize temporal experience reflects deeper power dynamics and political choices [1].
The formalization of global time systems accelerated during the modern era. Railroad companies in the United States drove the adoption of a four-time-zone system announced on November 18, 1883 [1]. The following year, an international conference in 1884 designated Greenwich, England, as the location of the Prime Meridian, establishing a universal reference point for global timekeeping [1]. These decisions were not merely technical but represented assertions of authority and influence over how the world would measure itself.
National governments have continued to deploy time zones as instruments of political control and national identity. China, despite spanning more than 3,000 miles (5,000 kilometers) geographically, has maintained a single official time zone—Beijing Time—since the Communist Party assumed power in 1949 as a deliberate expression of state unity [1]. Contemporary debate over time measurement remains contentious: the U.S. House of Representatives overwhelmingly passed legislation calling for year-round daylight saving time, though the nation experimented with this approach in the 1970s with limited success [1]. As Boston University political science professor Elizabeth Cohen has noted, "Every measurement of time is arbitrary" [1], underscoring that choices about how societies organize temporal experience are ultimately political rather than inevitable [1].