minchaGedolaOhrHaChaim

Mincha gedola of the לוח המאור אור החיים: 30 minutes after chatzos, or 30 minutes zmaniyos when those are longer. Unlike minchaGedolaGreaterThan30 the seasonal half hour is measured from chatzos rather than 6.5 shaos zmaniyos after sunrise, which puts it a few seconds apart when the equation of time is moving quickly.

See also