「Array of one-of-a-kind」describes the unique name of each day in the week.
　「Sun like pheasant tail plumes」: a bird with grand plumage, long tail feathers, and colorful wings all as if in a continuous「flashing, brilliant courtship display.」The Sun appears to move in the sky each DAY OF THE WEEK in an arc, rising in the east and setting in the west at two different points along the horizon, similar to the shape of a pheasant plume. Pheasants are birds that spend most of life on the ground, in tall grass, and recall that other glyphs meaning sunrise (倝) and sunset (莫) have been suggested as depicting the Sun among tall grass or reeds.
　Pheasants fly rather slowly while making a great deal of commotion as if still「in training」and are easily noticed, as is the Sun during the day. Pheasants do not normally fly far when disturbed, usually only about 100 meters or so, similar to an arc across the sky to the horizon but not beyond. Pheasants are all「young」with the average lifespan typically of one year. Pheasants lay eggs but then continue walking, often not returning to incubate or roost, as does the Sun continue relentlessly across the sky each day without stopping.
　Depicting the seven known ancient, dazzling luminaries winging their way through the heavens each day, like brightly colored「days of pheasants」as Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn, with one luminary associated with each day of the week, respectively. Elements literally as「day with very young girl having newly-no-longer-integrated feet in training with person palming prick in mating display」is also suggestive of a noticeable, colorful bright spot that cannot move quickly and only moves in one direction, away from the pricks (tall grasses) in the morning but settles in with them each night…further speculation regarding why these specific elements have been used for each day of the seven-day week is up to you. Note the ancient Chinese used a ten-day week.
　Interestingly, some Japanese versions of this glyph use multiple「grasping and reaming」(⺕) elements or「gushing chunks」(勿, without the 'head' attached) rather than the two congealing no-longer-integrated feet elements used in traditional Chinese glyphs, yet both sets of elements could describe a「plume」only that in the Japanese case the referent may be to release of a long, arching discharge of fluids under pressure by a medical services provider rather than to no-longer-integrated feet that were not commonly found in Japan. Needless to point out perhaps is that the Chinese uses of two no-longer-integrated feet (羽) also were designed to cause the same sort of release of fluids under pressure in long, arching spurts and gushing chunks while flashing brilliantly.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: bright; glorious; one of the seven planets of pre-modern astronomy
Unihan extended: glorious, as sun; daylight, sunlight; one of the seven planets of pre-modern astronomy (the sun, the moon, Mercury, Venus, Mars, Jupiter, and Saturn)
EDRDG: weekday

Used within names (nanori)
てる