As Buddha is auspicious by its nature and it rules Wednesday, thus it is considered to be good day and all auspicious works can be done during it. The nature of it is "ordinary, mixed", thus all "ordinary" types of works are good at this weekday. In combination with "mixed" Nakshatras (Mishra or Sadharana Nakshatras which are Vishakha and Krttika) activity related to this Nakshatras will be very fruitful. As for effectiveness - Wednesday is effective during night and day both. Wednesday is auspiscious for everything related to green colour, works, related to intellect. All works that somehow are related to maintenance, finding solutions for any kind of problems, etc. are very auspiscious at this day (as Vishnu is a tutelary Devata of it). Adhi-Devata (superior deity who's ruling the day) of Wednesday is Hari (another form of Vishnu).

Works in following fields are prescribed for Wednesday: fine arts; all types of arts; literature-, music-, dancing & starting thereof; sculpturing; theatre; education; writing; learning of Vedas, Shastras; Moorti or Prateema (idol) making; Mantra Kriya; meritorious works; marriage; friendship; starting of fasting; taking of holy bath; trade; intellectual works, clever works; scientifical activity (science); metal work; war; argument; intelligence; ingenuity; messenger, diplomacy; physical exercise; collection of articles; juices and food grains; green sapphire; earth; clothes; fragrant articles; ending of fasting; works which take long time and works which finish in the middle.

Its nature is Anand Prada, which can be interpreted as "inculcates happiness", "leads to Ananda". It's good for following works: marriage; religious works, Alankar, Upanayana, Devotsava; Vrata, fasting, completion of fasts; jewellery; painting, learning of sculpturing, clothes designing, dress, dance; travel; enter, starting of house, manufacturing of drinks, trade. Usually it's observed by fasting and almost every Ekadashi has it's own meaning and purpose.
Being Nanda (that can be translated as "prosperity", "good", "happiness"), it is also suitable for following works or actions: related to clothes; dance, vocal music, festivals, art & sculpture, painting; farming, house, clothes, Aalankar (ornament, decoration); enjoyments, Tantris Kāryas.

Related Devatas: Rudra, Vishvadeva, Shukra.
Sompad Tithi month: Pausha.
Manvadi Tithi month: Pausha.
Maasa Tithi Shoonya: Ashwin.
Tithi Shoonya Lagna: Dhanu, Meena .
Tithi Shoonya Nakshatra: Rohini.
Surya Rashi for Dagdha Tithi: none.

Specific actions and works that are suitable for initiation during Chandra in Uttara Phalguni (another name - Uttara): Manglik (auspicious) works, Upanayana, Seemanta, marriage; honouring; erection, starting of a house and ntering thereof; installation of moorti or prateema of deity, Yantras etc; coronation, inauguration; wearing new clothes, ornament, jewellery; cow / horse / elephant works; iron & steel works; sleep, place of seating; comfort, leisure; stable & fixed works.

Vishti (Vishtā) is Pāpa (malefic), moving Karana, ruled by Yama (deity, who's responsible for death matters), suitable for: war, igniting fire, posioning, destruction of enemies, overcoming of difficulties. Shani (Saturn) is Graha, who's ruling Vishtā.

Harshana is the 14th Nitya (Naisargika) Yoga, which is ruled by Bhaga and considered to be benefic. Its effect usually described as "joy", "rejoicing", "blooming" or "delightful". Graha, who's ruling Harshana, is Surya (Sūrya).

Analysing Muhurta, Chandra in Kanya (Virgo) gives bad Chandrabala if one's Janma Rashi (disposition of Chandra in certain sign at birth time) is Kumbha (Aquarius), Mesha (Aries) or Tula (Libra).