Each day is ruled by a planet, and those influences can aid in the power of spells if you do a spell on a particular spells.  The following is a list of the days and the types of spell that is best done.  If you need to do a spell and it is the "wrong" day, don't worry it just means the planet for the type of spell will have no effect on your spell.  For example, if you wanted to do a spell for Love, the best day would be Friday (Ruled by Venus) but if you did the spell on Sunday, you could ask that your love be a success or fun..
 

Sunday (Sun -- yellow, gold, orange): health, success, career, goals, ambition, personal finances, advancement, drama, fun, authority figures, law, fairs, crops, totem animals, volunteer and civic services, promotion, the God, men's mysteries, children, buying, selling, speculating.

Monday (Moon -- white, silver, grey, pearl): psychic pursuits, psychology, dreams/astral travel, imagination, women's mysteries, reincarnation, short trips, women, children, the public, domestic concerns, emotions, fluids, magick, spirituality, nursing, all things pertaining to water, antiques, trip planning, household activities, initiation, astrology, new-age pursuits,  archetypes, totem animals, shape shifting, religious experience.

Tuesday (Mars -- red, pink, orange): passion, partnerships, courage, action, energy, strife, aggression, sex, physical energy, sports, guns, tools, metals, cutting, surgery, police, soldiers, combat, confrontation, business, buying and selling animals, mechanical things, repair, gardening, woodworking, hunting, beginnings.

Wednesday (Mercury -- purple, magenta, silver): wisdom, healing, communication, intelligence, memory, education, correspondence, phone calls, computers, messages, students, merchants, editing, writing, advertising, signing contracts, siblings, neighbours, kin, accounting, clerks, critics, music, editors, journalists, visual arts, hiring employees, learning languages, placing ads, visiting friends, legal appointments, astrology.

Thursday (Jupiter -- blue, metallic colours): business, logic, gambling, social matters, political power, material wealth, publishing, college education, long-distance travel, foreign interests, religion, philosophy, forecasting, broadcasting, publicity, expansion, luck, growth, sports,  horses, the law, doctors, guardians, merchants, psychologists, charity, correspondence courses, self-improvement, researching, reading, studying.

Friday (Venus -- pink, green, white): romantic love, friendships,  beauty, soul mates, artistic ability, harmony, affection, relationships, partners, alliances, grace, luxury, social activity, marriage, decorating, cosmetics, gifts, income, growth, gardening, architects, artists, beauticians, chiropractors, dancers, designers, engineers,  entertainers, fashion, music, painting, poetry, courtship, dating, household improvements, planning parties, shopping.

Saturday (Saturn -- grey, black, red, white): binding, protection,  neutralisation, karma, death, manifestation, structure, reality, the laws  of society, limits, obstacles, tests, hard work, endurance, real estate,  dentists, bones, teeth, farm workers, sacrifice, separation, stalkers, murderers, criminals in general, civil servants, justice, maths,  plumbing, wills, debts, financing, joint money matters, discovery, transformation, relations with older people.