NAME

phases — calculate date/time of principal lunar phases around a date.

SYNOPSIS

phases [options]

OPTIONS

--help

Prints a brief help message and exits.

--date

Date, either a calendar entry in format YYYY-MM-DD, or a floating-point Julian Day:

--date=2019-06-08 # calendar date
--date=2438792.99 # Julian date

--timezone

Time zone name, e.g.: EST, UTC, Europe/Berlin etc. or offset from Greenwich in format +HHMM / -HHMM, like +0300.

--timezone=CET # Central European Time
--timezone=EST # Eastern Standard Time
--timezone=UTC # Universal Coordinated Time
--timezone=GMT # Greenwich Mean Time, same as the UTC
--timezone=+0300 # UTC + 3h (eastward from Greenwich)
--timezone="Europe/Moscow"

By default, a local timezone.

Please, note: Windows platform may not recognize some time zone names, like MSK. In such cases use offset from Greenwich format, as described above.

--theme: color theme

• dark (default): for dark consoles

• light: for light consoles

• colorless: without colors, for terminals that do not support ANSI color codes

--no-colors: do not use colors, same as --theme=colorless

DESCRIPTION

phases Computes lunar phases around a date. Current phase (from perspective of the query date) is highlited and marked with asterisk.

For instance,

Date          :  2021-02-22

First Quarter :  2021-02-19 21:48:11 *
Full Moon     :  2021-02-27 11:20:33

means that the query date, Feb 22, belongs to the First Quarter, while the next phase will start on Feb 27.