Within a technical or scientific context, internationally standardized units and unit symbols shall be used – in German as well as in English.
The SI base unit for time is the second. The units minute, hour, and day are non-SI units that are recognized as having to be retained for use together with the SI.
Unit symbol │ Unit name
│ English │ German
s │ second │ Sekunde
min │ minute │ Minute
h │ hour │ Stunde
d │ day │ Tag
Note that unit symbols are not abbreviations. They are not followed by a period except at the end of a sentence.
The unit symbols shall be placed after the numerical value, leaving a space between the numerical value and the unit symbol:
1 d = 24 h = 1440 min = 86 400 s