January birthdays.

Across January the Sun moves through Capricorn into Aquarius. Pick a date for its exact solar coordinates — degree range, decan and bound rulers, fixed-star contacts, and this cycle’s slow transits answering to that degree.

• January 1 — Sun 10°33′–11°19′ Capricorn
• January 2 — Sun 11°34′–12°21′ Capricorn
• January 3 — Sun 12°35′–13°22′ Capricorn
• January 4 — Sun 13°36′–14°23′ Capricorn
• January 5 — Sun 14°37′–15°24′ Capricorn
• January 6 — Sun 15°39′–16°25′ Capricorn
• January 7 — Sun 16°40′–17°26′ Capricorn
• January 8 — Sun 17°41′–18°27′ Capricorn
• January 9 — Sun 18°42′–19°29′ Capricorn
• January 10 — Sun 19°43′–20°30′ Capricorn
• January 11 — Sun 20°44′–21°31′ Capricorn
• January 12 — Sun 21°46′–22°32′ Capricorn
• January 13 — Sun 22°47′–23°33′ Capricorn
• January 14 — Sun 23°48′–24°34′ Capricorn
• January 15 — Sun 24°49′–25°35′ Capricorn
• January 16 — Sun 25°50′–26°36′ Capricorn
• January 17 — Sun 26°51′–27°37′ Capricorn
• January 18 — Sun 27°52′–28°39′ Capricorn
• January 19 — Sun 28°53′–29°40′ Capricorn
• January 20 — Sun 29°55′ Capricorn – 0°41′ Aquarius
• January 21 — Sun 0°56′–1°42′ Aquarius
• January 22 — Sun 1°57′–2°43′ Aquarius
• January 23 — Sun 2°58′–3°44′ Aquarius
• January 24 — Sun 3°59′–4°45′ Aquarius
• January 25 — Sun 5°00′–5°46′ Aquarius
• January 26 — Sun 6°01′–6°47′ Aquarius
• January 27 — Sun 7°02′–7°48′ Aquarius
• January 28 — Sun 8°03′–8°49′ Aquarius
• January 29 — Sun 9°04′–9°50′ Aquarius
• January 30 — Sun 10°04′–10°51′ Aquarius
• January 31 — Sun 11°05′–11°52′ Aquarius