man : pom(6)
POM(6) OpenBSD Reference Manual POM(6)
pom - display the phase of the moon
The pom utility displays the current phase of the moon. Useful for
selecting software completion target dates and predicting managerial
[[[[cc]yy]mm]dd]HH Display the phase of the moon for a given time.
The format is similar to the canonical
representation used by date(1).
Times must be within range of the UNIX Epoch.
This program is based on routines from Practical Astronomy with Your
Calculator, Third Edition by Peter Duffett-Smith.
OpenBSD 4.9 December 31, 2009 OpenBSD 4.9