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“In electronic signaling, phase is a definition of the position of a point in time (instant) on a waveform cycle. Lagging phase refers to a wave that occurs "behind" another wave of the same frequency. When two signals differ in phase by -90 or +90 degrees, they are said to be in phase quadrature. So time within a day remains constant but the counting of it can vary.” — Rico Roho
In electronic signaling, phase is a definition of the position of a point in time (instant) on a waveform cycle. Lagging phase refers to a wave that occurs "behind" another wave of the same frequency. When two signals differ in phase by -90 or +90 degrees, they are said to be in phase quadrature. So time within a day remains constant but the counting of it can vary.