About Day Pillar
Day Pillar is a small, independent project. The calculator is free and takes no account. The conventions it applies are published in full, and the cases it is tested against are published too — including the ones where a naive implementation would get the year wrong.
Chart interpretation is by a named practitioner, with their background and experience set out here. [to be completed before launch]
If a chart here is wrong
Email hello@daypillar.com and it gets looked at the same day. If the cause is a convention difference, the methodology page will say so and we will point you at the relevant section. If it is our error, sales stop until it is fixed, the fix goes into the verification corpus as a permanent test case, and it is recorded below.
Errata
No corrections yet. This section stays even when it is empty — a log that only appears once there is something to hide is not a log.