Using the Sun Symbol
The sun symbol is a filled disc surrounded by short rays, encoded as U+2600 at the very start of the Miscellaneous Symbols block in 1993. Its hollow companion ☼ at U+263C is older still, because it was one of the pictures in the original IBM PC character set, which is why Alt + 15 on a Windows keypad still produces it. When emoji arrived, only the filled sun gained a coloured form, so ☀️ becomes a yellow sun on every phone while ☼ stays an outline in the text colour forever.
The three looks
Typed alone, ☀ takes the colour of the surrounding text and works as a compact glyph in a sentence. With the variation selector U+FE0F it becomes the emoji ☀️. A third form, ☀︎ with the text-style selector U+FE0E, tells keyboards and apps that would otherwise upgrade the character to keep it plain, and this is the version that dominates minimalist Instagram and Pinterest bios, where a small monochrome sun sits between words without the cartoon yellow. All three are the same underlying character, so searches and filters treat them identically.
Seasonal and aesthetic use
The sun is the summer counterpart to the snowflake symbol: the same slot in a display name that held ❄ in December holds ☀ in June. It opens holiday captions, marks travel and beach accounts, and appears in "good morning" posts next to 🌅. In the sparse aesthetic style, ☀︎ often pairs with a lowercase name and a tiny ornament from the aesthetic symbols page, for example "☀︎ maya ☀︎". For a full light-and-dark theme, some profiles balance it with a moon ☾ or the yin yang symbol.
Other meanings
In weather forecasts ☀ means clear skies, and in interface design it is the universal icon for brightness and for light mode, which is why the bright button 🔆 looks so similar. The dotted circle ☉ is a different character: astronomers use it for the Sun, so that M☉ means one solar mass, and alchemists used the same glyph for gold. Do not swap the two; ☉ in a caption looks like a target rather than sunshine.
Placement and rendering
Treat the sun as a word with a space on either side, or as a bracket around a name. One per line is enough; a row of five reads as shouting. The text glyph is present in every system font and shows on old phones, e-readers and forum software that strip emoji, while the yellow version needs an emoji font, which any device from the last decade has. There is no Alt code for the filled sun, only for the hollow ☼; in Word type 2600 then Alt + X, or open the Win + . panel. A light alphabet from the cursive fonts generator suits the summery look better than a heavy one.