green calendar material over dark background

>For other uses, see Green (disambiguation). Green is a color seen commonly in nature. Many plants are green mainly because of a complex chemical known as chlorophyll which is involved in photosynthesis.Green light has a wavelength of roughly 520–570 nm and is one of the additive primary colors. It is the complement of magenta. Many artists, however, continue to use a traditional color theory in which the complement of green is considered to be red.People who are red-green color blind can often distinguish between the two colors but confuse them with other colors, for example, bright green with yellow; dark green with brown. See more at Wikipedia.org...

endar is a system for naming periods of time, typically days. These names are known as calendar dates. The dates may be based on the perceived motion of astronomical objects. A calendar is also a physical device (often paper) that illustrates the system (for example, a desktop calendar) — this is the most common usage of the word. See more at Wikipedia.org...

ternate uses: Flat (disambiguation)In music, flat means "lower in pitch." More specifically, in music notation, flat means "lower in pitch by a semitone," and has an associated symbol (), which looks like a lowercase "b"; the note A flat is shown in musical notation in Figure 1. Under equal temperament, C flat is the same as, or enharmonically equivalent to, B and F flat is the same as E. There also exist double-flats, which look like and lower a note by two semitones. Less often one will encounter half, three-quarter, or otherwise altered flats. See more at Wikipedia.org...