Weekdays: Today is ghItlhjaj.

The traditional Klingon week has six days. When klingons encounter cultures using more days, they name the additional days by numbers. For instance on Earth, Sunday is called jaj wa' = "Day 1".

DaSjaj	Monday
povjaj	Tuesday
ghItlhjaj	Wednesday
loghjaj	Thursday
buqjaj	Friday
ghInjaj	Saturday
lojmItjaj	Saturday

The lenghty form (lojmItjaj) is apparently used for formal occasions, although both words are used interchangably. (1)

Puns

The words are based on songs by the Beatles.

References

1 : http://www.qephom.de/e/newwords.html List of new Klingon canon words