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.

It's nature is Ugra Prada, which can be interpreted as "increase of agression and agressiveness". It's good for following works: bad works, attack by deception, hunting, poisoning, war, weapon, making of (fire) arms, fire, arresting; success in cruel works, steel. Also it's bad for travelling & hair cutting.
Being Rikta (that can be translated as "empty hands", "scanty", "destitute") it is also suitable for following works: arresting, poisoning, uses of weapon, surgery, igniting fire. Travelling in any direction is strictly prohibited and should be avoided during Shukla Chaturdashi.

Related Devatas: Shiva, Kali, Shani.
Sompad Tithi month: none.
Manvadi Tithi month: none.
Maasa Tithi Shoonya: Kartika.
Tithi Shoonya Lagna: none.
Tithi Shoonya Nakshatra: none.
Surya Rashi for Dagdha Tithi: none.

Specific actions and works that should be initiated during Chandra in Uttara Ashadha: temple erection, starting house & entrance thereof; erection, coronation; travelling; sowing seeds; jewellery; new clothes; horse, elephant; marriage, Upanayana, Seemanta; stone & iron works;  flag-crown-Chatra; land; conveyance; peaceful works; actions related to deity (for ex. worshipping), stability; awarding-honouring.

Vanija (Vanijā) is benefic, moving Karana, ruled by Lakshmi or Shree Devi (according to vedic tradition, deity, Vishnu's consort, that is responsible for wealth, happiness and luck), suitable for: trade, stable works, meetings, enjoying comforts. Graha, who's ruling Vanijā, is Shukra (Venus).

Ayushman (Āyushmān) is the 3rd Nitya (Naisargika) Yoga, which is ruled by Chandra (Soma) Devata and considered to be benefic. Its effect usually described as "one that having longevity" (as the word "ayush" can be translated from sanskrit as "life"). Graha, who's ruling Āyushmān Nitya Yoga, is Ketu.

Analysing Muhurta, Chandra in Makara (Capricorn) gives bad Chandrabala if one's Janma Rashi (disposition of Chandra in certain sign at birth time) is Mithuna (Gemini), Simha (Leo) or Kumbha (Aquarius). Also being in Makara, Chandra makes consciousness less dynamic (as it is Prithvi Rāshi), but quite efficient, it's a good time for all activities were rationality, discipline, patience and insistince are needed (as Makara is ruled by Shani (Saturn)).