To know Which Tithi is Today or Today's Panchang visit - https://soulandsigns.com/content/ss/tools.html
In Vedic time keeping, a tithi is a lunar day, or the time it takes for the longitudinal angle between the Moon and the Sun to increase by 12°. In other words, a tithi is a time-duration between the consecutive epochs that correspond to when the longitudinal-angle between sun and moon is an integer multiple of 12°. Tithis begin at varying times of day and vary in duration from approximately 19 to approximately 26 hours.[1]
Panchanga
A Hindu muhurta (forty-eight minute duration) can be represented in five attributes of Hindu astronomy namely, vara the weekday, tithi, nakshatra the Moon's asterism, yoga the angular relationship between Sun and Moon and karana half of tithi.
Tithi plays an important role along with nakshatra in Hindus' daily as well as special activities in selecting the muhurta. There are auspicious tithis as well as inauspicious tithis, each considered more propitious for some purposes than for other.
There are 30 tithis in each lunar month, named as:
Sl.No Krishna paksha
(dark fortnight) Shukla paksha
(bright fortnight) Deity and properties[citation needed]
1 Prathama / Padyami Prathama / Padyami The presiding deity of the first lunar day is Agni and it is good for all types of auspicious and religious ceremonies.
2 Dwitiya / Vidiya Dwitiya / Vidiya Vidhatr or Brahma rules this lunar day and is good for the laying of foundations for buildings and other things of a permanent nature.
3 Tritiya / Thadiya Tritiya / Thadiya Gauri is the lord of this day and is good for the cutting of one's hair and nails and shaving.
4 Chaturthi Chaturthi Yama/Ganapati is lord of the 4th lunar day, which is good for the destruction of one's enemies, the removal of obstacles, and acts of combat.
5 Panchami Panchami The Naaga or Serpents rule this day, which is favourable for administering medicine, the purging of poisons, and surgery.
6 Shashthi Shashthi Karttikeya presides over this day and is favourable for coronations, meeting new friends, festivities, and enjoyment.
7 Saptami Saptami The 7th lunar day is ruled by Surya; one may begin a journey, buy conveyances, and deal with other such things of a movable nature.
8 Ashtami Ashtami The Rudra rule this day, which is good for taking up arms, building of one's defenses, and fortification.
9 Navami Navami The Ambikaa rules this day, which is suitable for killing enemies, acts of destruction, and violence. Inauspicious for ceremonies and journeys.
10 Dasami Dashami The day is ruled by Dharmaraja and is auspicious for acts of virtue, religious functions, spiritual practices, and other pious activities.
11 Ekadasi Ekadashi Rudra rule this day; fasting, devotional activities, and remembrance of the Supreme Lord are very favourable. This day has special religious significance in Hinduism and Jainism—usually observed by fasting.
12 Dvadasi Dwadashi The Vishnu or Aditya rules this day, which is auspicious for religious ceremonies, the lighting of the sacred fire, and the performance of one's duties.
13 Trayodasi Thrayodashi The day is ruled by Kamadeva and is good for forming friendships, sensual pleasures, and festivities.
14 Chaturdashi Chaturdashi Kali rules this day, suitable for administering poison and calling of elementals and spirits.
15 Amavasya
(new moon) Purnima or Paurnami
(full moon) The Pitru-devas rule the New Moon, suitable for the propitiation of the Manes and performance of austerities. Purnima is ruled by Moon and is suitable for merry making and fire sacrifice.
References - https://en.wikipedia.org/wiki/Tithi
Tithis and Their Deities
To help with the selection of a positive “time Shakti” (or window) for your activities, listed the meaning of each Tithi and its respective ruling deity (or deities). Happy creations!
Shukla Paksha – Waxing Cycle
1st Waxing ( Shukla Pratipada) ruled by Kubera, God of wealth and Brhma, the Creator God. Good for Planning and Developing Strategies for Projects. It’s not good for Any Auspicious Ceremonies or Journeys.
2nd Waxing (Shukla Dwitiya) ruled by Lord Vivadeva. Auspicious for Marriage, Viewing Moon, Buying Wedding Ring, Installation of Deities. Inauspicious for harsh activities such as disputes or conflicts.
3rd Waxing (Shukla Trititya) ruled by Shiva and his consort Gowri. Auspicious tithi for house warming, building a house, artistic endeavors. Inauspicious for conflicts and litigations.
4th Waxing (Shukla Chaturthi) ruled by Ganesha. Good for strategic planning against competitors and not good for any auspicious ceremonies.
5th Waxing (Shukla Panchami) ruled by Lalitha Tripura Sundari. Auspicious for all ceremonies.
6th Waxing (Shukla Shasti) ruled by Muruga. Good for buying real estate and jewelry.
7th Waxing (Shukla Saptami) ruled by Surya, the Sun God. Auspicious for ceremonies such weddings.
8th Waxing (Shukla Ashtami) ruled by Durga. Inauspicious for most activities, except for ancestor worship.
9th Waxing (Shukla Navami) ruled by Goddess Saraswati. Goodfor activities against enemies and rivals. Inauspicious for ceremonies and journeys.
10th Waxing (Shukla Dashami) ruled by Veerabhadra, the general of Shiva’s army, and the God of Dharma. It’s auspicious for all events, including ceremonies and inaugurations of buildings.
11th Waxing (Shukla Ekadashi) ruled by Vishnu and auspicious for wedding ceremonies and for fasting. This time-window allows us to tune into the energy the wealth-giving archetypes, Vishnu.
12th Waxing (Shukla Dwadashi) ruled by Vishnu. Good for planning and developing strategies, donating money and fasting.
13th Waxing (Shukla Tryadashi) ruled by Shiva and Kamadeva. Good for writing new books, for karma removal rituals and dancing.
14th Waxing (Shukla Chaturdashi) ruled by Rudra, an ancient and fierce form of Shiva. This aggressive energy is best used for worship to this God.
15th Waxing (Poornima, or Full Moon) auspicious for worshipping Lakshmi, Saraswati and Parvati asking for manifestation of wishes. It’s an auspicious day for ceremonies and spiritual practices.
Krishna Paksha – Waning Cycle
1st Waning (Krishna Pratipada) ruled by Durga and favors planning for projects and medical procedures. Not good for any auspicious events.
2nd Waning (Krishna Dwatiya) ruled by Vayu, God of the wind. God for construction of buildings and pilgrimage.
3rd Waning (Krishna Tritiya) ruled by Agni, God of fire. Good for construction and artistic activities.
4th Waning (Krishna Chaturthi) ruled by Ganesha. Good for removing obstacles. Not auspicious for sacred ceremonies.
5th Waning (Krishna Panchami) ruled by the Serpent deities, Nagas. It’s good for spiritual practices and pilgrimage.
6th Waning (Krishna Shasti) ruled by Mars. Good for taking medication and real estate transactions.
7th Waning (Krishna Saptami) ruled by the sages and Indra. Not auspicious for ceremonies. It’s good for planning for overcoming obstacles.
8th Waning (Krisha Ashtami) ruled by a form of Shiva, Kala Bhairava, the God of time. It’s not good for any auspicious ceremonies and activities, negotiations or medical treatments.
9th Waning (Krishna Navami) ruled by Yama and Durga. This is possibly the least auspicious of all phases. Best activities are strategic planning for future projects and overcoming obstacles from enemies and competitors.
10th Waning (Krishna Dashami) ruled by Jupiter and the God of Dharma. Auspicious for all ceremonies and events and meeting with dignitaries.
11th Waning (Krishna Ekadashi). Buying gold and jewelry and fasting to lord Vishnu.
12th Waning (Krishna Dwadashi) ruled by Venus. Good for planning donations of food and money.
13th Waning (Krishna Triodashi) ruled by Nandi, Shiva’s bull. Good for karma removal rituals, yoga and meditation.
14th Waning (Krisha Chaturdashi) ruled by Rudra. Good for spiritual practice, Shiva worship and planning for overcoming problems. Not good for marriage or auspicious ceremonies.
15th Waning (Amavasya or New Moon) also called the “no Moon day” as it’s the darkest phase. This day is ruled by Kali. Good for meditation, feeding people and animals, and ancestral rituals. Not good for marriage ceremonies or starting a new activity — but rather wait until the first waxing Moon for launching your new projects.
References - http://vedicartandscience.com/tithis-es ... happiness/