I was planning to make a post about his festivals anyway, so here we go!
Apollo's festivals
We probably have the most detailed accounts of Attic/Athenian and Panhellenic festivals when it comes to most gods. Of course, other festivals such as regional ones did exist and I could mention some of them and the scarce bits and pieces of information that have survived but in this post I will focus on festivals and celebrations we know a little more about - some of the ones we could celebrate nowadays or even attempt to reconstruct. There were plenty of festivals celebrating different gods and Apollo had quite a few of his own but I think this will be more useful in terms of modern religion.
I will briefly talk about the history, how the festivals were celebrated back in ancient times and what we could do nowadays. Don't stress if you don't have access to some of the things listed as offerings. These are only my suggestions and things that could especially be associated with each festival. It's fine to offer something else.
So, let's go over some main festivals of Apollo:
Just a PSA: you don't have to celebrate all of them
Pythian Games - Panhellenic; every four years - during the third year of each Olympiad
History: The games were said to have been established shortly after Apollo killed Python and set up the oracle at Delphi. They were also meant to commemrate those events.
Celebration: involved various athletic (foot & chariot races) and musical competitions. The winners received a wreath of bay laurels from the city of Tempe in Thessaly.
What could we do nowadays: Offerings - wine, oilve oil, laurel; watch sport/musical competitions on the TV or attend an event like that; physical activity, listen to music, sing, write songs/poetry
Pyanopsia/Pyanepsia - Athenian; 7th day of Pyanopsion (around October)
Gods: Apollo, Helios, Horai
History: The origins of the festival are linked to the Athenian hero Theseus was said to have established the celebration to thank Apollo and commemorate his victory over the Minotaur.
Celebration: Rites incorporated remnants of rustic magic, including two offerings, consisting of a hodgepodge of the pulse (edible seeds) and a branch of olive or laurel bound with wool, around which were hung fruits of the season, pastries, and small jars of honey, oil, and wine. The offerings were carried to the Temple of Apollo, where they were suspended on the gate. The doors of private houses were similarly adorned. Children carried Eiresione [Ειρεσιώνη] - a wand of laurel. They were going from house to house singing. It's possible that in exchange for Eiresione, the children received small gifts. Eiresione was said to bring good luck over the year if fixed above the door.
What could we do nowadays: Offerings - especially seeds from the legume family, grains, honey, wine, olive oil, fruit, incense, laurel & olive branches/leaves; singing, celebrating with your loved ones (if you can), prayer/hymns, exchanging small gifts, hanging a laurel/olive branch over the door
Delphinia - Athenian; also celebrated in various other parts of Greece; 6th Mounychion (around April)
History: Again, connected to Theseus
Celebration: involved a procession to the Delphinion (the shrine) where both Apollo and Artemis were worshipped. Seven boys and seven girls carried olive branches, bound with white wool. There's a possibility Apollo was also honoured as a god having influence on the sea.
What could we do nowadays: Offerings - especially olive oil, olive branches/leaves, water, saltwater, wine, incense; going on a walk - especially somewhere by the sea or a river; prayer/hymns
Gynmopedia - Spartan; annual (around the 6th to the 10th of July)
Gods: Apollo, Artemis & Leto
History: might've begun in 668 BCE to honour a Spartan victory in Thyrea. Apparently, it's possible that Lacedaemonians took it "more seriously than any other festival". It was the first public gathering of the new year.
Celebration: it featured enerations of naked Spartan men participating in war dancing and choral singing, basically it was an exhibition of all kinds of accomplishments in gymnastics, music, and dancing. They would honour Apollo through songs and performed songs which represented the phases of life. The leader of each chorus group would wear a headpiece known as the "feather crown" made of palm leaves.
What could we do nowadays: Offerings - palm leaves; dance, singing, blasting music, physical activity, celebrate with your loved ones (if you can), reflect on life a bit
Hyacinthia - Spartan (+Amyclae); three-day & annual (probably early summer)
Gods: Apollo & Hyacinthus
History: Based on mythology. Held in honour of the Spartan youth, Hyacinthus who was a lover of Apollo.
Celebration: Athletic contests were held to commemorate Hyacinthus' death (killed with a miscast discus). The rites gradually passed from mourning for Hyacinthus to rejoicing in the majesty of Apollo. It's probable the festival was connected with vegetation and might've marked the passage between spring and summer.
What could we do nowadays: Offerings - flowers, incense, grains; physical activity, prayer/hymns, take some time to appreciate the people in your life, read the myth about Hyacinthus
Karneia - Spartan, 7th (Attic) Metageitnion/(Spartan) Karneios (around August)
History: Due to the sacred law, the festival was the reason why Spartans did not help the Athenians in the Marathon battle.
Celebration: Five young men were chosen out of each tribe; one man, decked with garlands, ran away, and the rest followed him. The festival might've been connected to vegetation and fertility.
What could we do nowadays: Offerings - flowers, grains, fruit; prayer/hymns, physical acrivity (go for a jog/play tag?), spend some time outside, learn about the Battle of Marathon
Thargelia - Athenian; (pretty important festival), annual 6th & 7th of Thargelion (around May)
History: held on birthdays of Artemis & Apollo; sometimes it might've involved human sacrifice, especially in it's early days
Celebration: vegetation ritual; It was common to offerthe first-fruits of the earth to the gods. The first day involved a purifying and expiatory ceremony. On the second day of the festival there was a feast and procession as a mark of thanksgiving. Branches of olive bound with wool, borne by children, were affixed by them to the doors of the houses (pretty much the same thing as during Pyanopsia). Musical contests were also common on the second day.
What could we do nowadays: Offerings - grains, bread, honey cakes, all kinds of fruit (especially figs), honey, wine, olive oil, incense, olive branches/leaves; prayer/hymns, plan a purification ritual/activity (it could even involve things like: cleaning your house, taking a bath, etc.), make dinner and invite friends/loved ones to share it with, sing and listen to music.
Apollo is also honoured during:
- Noumenia (new moon) under his epithet Noumenios
- The 7th day of each month
- During Summer/Winter Solistice (his arrival from/deparure to Hyperborea, marking the change in seasons, if you follow the myth)
Some things that might also be useful:
It's a simplified diagram showing some main Hellenic holidays. You can find more info on the website (link above). Of course, this is not the only way to celebrate Hellenic festivals but since you mentioned the Wiccan Wheel of The Year, I figured it could be easier to picture or get used to.
- Attic Callendar 2022 - a reconstruction of the Attic (lunar) calendar; days marked for specific festivals and to honour certain deities [FYI Hellenion is kinda problematic, though, so keep that in mind - see more about that here & here ]
- Ancient Greek Fesivals - summaries
- You can also create a personal, UPG-based festival/holiday! @theoi-crow explains it really well in this post - LINK
I might write a short post about other fesivals for/involving Apollo, such as Stepterion because I think it's particulary interesting but could be difficult to celebrate today. It's more of a bonus, so I'll just link it here once I'm done.
Hope this will be helpful!