Days of the week in Dutch: maandag (Monday), dinsdag (Tuesday), woensdag (Wednesday), donderdag (Thursday), vrijdag (Friday), zaterdag (Saturday), zondag (Sunday). Dutch days are not capitalized unless they start a sentence. The week starts on Monday in Dutch culture, as reflected in calendars.
Months: januari, februari, maart, april, mei, juni, juli, augustus, september, oktober, november, december. Again, no capital letters. Seasons: de lente (spring), de zomer (summer), de herfst (autumn), de winter (winter). To say something happens in a month: in januari, in de zomer.
Useful time expressions: gisteren (yesterday), vandaag (today), morgen (tomorrow), overmorgen (day after tomorrow), eergisteren (day before yesterday), volgende week (next week), vorige maand (last month), dit jaar (this year). These words are the backbone of scheduling and storytelling in Dutch.