daytimes / number of days

the sun / sunlight, sunshine / daytime, daylight / a day / time and date / a daily (something done everyday) / the weather / a (usually unfortunate) case, event, situation

sun / day

Short for 日曜日 (nichiyōbi): Sunday

ordinal day of a month / number of days

natural language understanding

(rare) the first day of the month

the fifth day of the month / five days

the sixth day of the month / six days

two days, a two-day period / the second day after some set point in time / the second day of the month