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B.2. Date/Time Key Words

Table B-1 shows the tokens that are recognized as names of months.

Table B-1. Month Names

MonthAbbreviations
JanuaryJan
FebruaryFeb
MarchMar
AprilApr
May 
JuneJun
JulyJul
AugustAug
SeptemberSep, Sept
OctoberOct
NovemberNov
DecemberDec

Table B-2 shows the tokens that are recognized as names of days of the week.

Table B-2. Day of the Week Names

DayAbbreviations
SundaySun
MondayMon
TuesdayTue, Tues
WednesdayWed, Weds
ThursdayThu, Thur, Thurs
FridayFri
SaturdaySat

Table B-3 shows the tokens that serve various modifier purposes.

Table B-3. Date/Time Field Modifiers

IdentifierDescription
ABSTIMEIgnored
AMTime is before 12:00
ATIgnored
JULIAN, JD, JNext field is Julian Day
ONIgnored
PMTime is on or after 12:00
TNext field is time

The key word ABSTIME is ignored for historical reasons: In very old releases of PostgreSQL, invalid values of type abstime were emitted as Invalid Abstime. This is no longer the case however and this key word will likely be dropped in a future release.