Lugh and Tailitu: Linked to Lugh, also known as Lleu Llaw Gyffes, and his mother Tailitu. Tailitu died of exhaustion after preparing Ireland for agriculture, and Lugh set up funeral games in her honour. Lugh is a warrior king, with solar and storm associations, and a major figure in many myths.
Dying gods: A good time of year for honouring dying gods, sacrificed gods, agricultural gods and so forth. There are a great many myths of this kind. Typically, these are seen as manifestations of the same myth. That's not how Landcrafting rolls - we see these gods as separate, but their tide of power is the same. The idea of a god who is sacrificed, or sacrifices herself for the land, is a very powerful one.
Harvest gods: Despite Landcrafting's general rejection of fertility imagery as the core of all magic, this IS a time of year where such imagery is appropriate. Figures associated with the harvest, both agricultural gods and gods of bounty, and images of the farmer or someone who tends the land, have power here. This is a time for images of domesticity and civilisation, Entwives not Ents, and images of us in control of nature. It's also a tide where powers of the wild and untamed green are likely to be diminished.
Lugh's Battle: Another associated legend with this time of year is a great battle. One god - Crom Dubh, perhaps a form of the Dagda - is guarding the crops as a treasure, and Lugh must sieze it for mankind, and then battle and defeat crop blight. Eithne - a woman's name meaning grain - is sometimes personified as a woman who they fight over. Balor, who Lugh defeated in battle, is sometimes seen as the representation of the blight.
As with all traditions in Landcraft, it's all a bit messy - but these are the key images and associations with the time of year.
Historically a Gaelic festival, marking the harvest.
First of the three harvest festivals in the Wheel of the Year.
Feast! Bread is baked, and corn art made. Bulls were sacrificed - beef is an appropriate food. Grains, seasonal fruit and berries, biscuits, cakes, cider and acorn flour are also possible. Any seasonal foods, but escpecially ones you have grown yourself.
According to wikipedia, the traditional games included: ritual athletic and sporting contests, horse racing, music and storytelling, trading, proclaiming laws and settling legal disputes, drawing-up contracts, and matchmaking. You could replicate these singly or in groups, by writing, making music, competing, doing sports or more. Lugh is said to have invented the board game fidchell, which is appropriate at this time. Traditionally, people would visit tall hills and holy wells.
Give to local food banks, volunteer time with them, and donate to charities supporting food overseas.
Making figures or symbols of corn, or of bread. Typically, a figure of a person.
Offering the first fruits of the harvest.
Performing a ritual play in which Lugh saves the harvest, or of Tailitu going under the earth, or Lugh emerging from captivity; or in some way, the witches celebrate and re-enact the saving of the grain.
Celebration of the symbolic harvests from your year, and of abundance.
In some places, the first farmer to finish his harvest would create a corn dolly representing the Cailleach - the witch of winter - and put the dolly into the field of the last farmer to finish. That farmer would have to feed, clothe and house her over winter. This could also be a form for ritual.
Celebrating a successful harvest is the traditional form of the harvest festival. But you can also celebrate this time of year before August, calling on the harvest to be fruitful.