>>>Sunrise & Sunset
Sunrise is the time at which the leading limb of the Sun first rises above the horizon. The effect of refraction in the Earth’s atmosphere lifts the image of the Sun about half a degree at the horizon, making sunrise about two minutes earlier than would be expected from the actual position of [...]
>>>Month
The month was originally defined as the time between one new moon to the next, a period now called the synodic month. In the modern calendar, however, there are 12 months in a year, each having a fixed number of days in order to sum to 365 (or 366 in a leap year).
Prior to [...]
>>>Friday 13th
The Gregorian calendar follows a pattern of leap years which repeats every 400 years. This is true since the number of days in 400 Gregorian years is
100 ( 3 x 365 + 366 ) - 3 = 146, 097
which is an exact number of weeks since it is divisible by 7 (namely, ). [...]
>>>Day of the week
W = D + [2.6m - 0.2] + y + [1/4y] + [1/4c] - 2c (mod7)
W=0 for sunday.
months numbered beginning with march. dates in january and february considered to be 11th and 12th months of previous year.
>>>Leap Second
Our current system of civil time is based on coordinated universal time (UTC), which is based on a system of atomic clocks. Leap seconds are used to guarantee that UTC does not differ from the Earth’s rotational time by more than 0.9 seconds.
The Earth’s rotation is decelerating at a rate of about 1.5 [...]
>>>Length of Day
The day is (roughly) defined as the time required for the Earth to complete a rotation. The length of the day is not a constant over long timescales (i.e., millions of years), but changes over the course of time as the Earth’s rotation slows due to the tidal torque from the [...]
Julian Day :: 2,452,993.87
The Julian day is the current date and time expressed as the number of days that have passed since Noon on January 1st, 4713 BC. It is used in astronomy since it is very easy to determine the time span between any two events by just subtracting the Julian day. This gets [...]
Mon 22 Dec 3:04 PM
Winter Solstice. The Sun reaches its furthest southern point marking the beginning of winter in the northern hemisphere and summer in the southern. This is also the longest night & the shortest day in the northern hemisphere - opposite in the south.
Mon 22 Dec 8:00 PM
The Moon is at perigee, subtending [...]
it rains rains rains
daily.
rainy
.
gentle cool.
grouchy thunder.
light festive spirit.
gay heart.
Ayako Maeda In Concert @ Alliance Francaise Theatre
[flute recital]
beautiful …
