The Sanskrit days of the week are the Hindi ones with वासरः ("day") in place of वार: रविवासरः, सोमवासरः. Each is named after a heavenly body, in the same order used across India and, remarkably, across Europe too: the Sun, the Moon, Mars, Mercury, Jupiter, Venus and Saturn. गुरुः is the planet Jupiter and also "teacher", which is why Thursday is the teacher's day.
Colour words are adjectives, so they take the gender of the thing they describe: a white cloth is श्वेतं वस्त्रम् (neuter), a white horse श्वेतः अश्वः (masculine), a white cow श्वेता गौः (feminine). They are given here in the masculine form.
The school words at the end let you name everything on your desk. Several were coined in modern times from old roots, in the way Sanskrit has always made new words: सङ्गणकम् (computer) is "that which counts together", and दूरवाणी (telephone) is "far voice".
रविवासरः
ravivāsarah
रविवार
Sunday
सोमवासरः
somavāsarah
सोमवार
Monday
मङ्गलवासरः
mangalavāsarah
मंगलवार
Tuesday
बुधवासरः
budhavāsarah
बुधवार
Wednesday
गुरुवासरः
guruvāsarah
गुरुवार
Thursday
शुक्रवासरः
shukravāsarah
शुक्रवार
Friday
शनिवासरः
shanivāsarah
शनिवार
Saturday
प्रातःकालः
prātahkālah
सुबह
morning
मध्याह्नः
madhyāhnah
दोपहर
noon
सायङ्कालः
sāyankālah
शाम
evening
रात्रिः
rātrih
रात
night
श्वेतः
shvetah
सफ़ेद
white
कृष्णः
krishnah
काला
black
रक्तः
raktah
लाल
red
नीलः
nīlah
नीला
blue
हरितः
haritah
हरा
green
पीतः
pītah
पीला
yellow
विद्यालयः
vidyālayah
विद्यालय
school
कक्षा
kakshā
कक्षा
classroom; class
पुस्तकम्
pustakam
पुस्तक
book
लेखनी
lekhanī
क़लम
pen
कृष्णफलकम्
krishnaphalakam
श्यामपट
blackboard
छात्रः
chhātrah
छात्र
student
शिक्षकः
shikshakah
शिक्षक
teacher
सङ्गणकम्
sanganakam
कंप्यूटर
computer
Use them in sentences
- अद्य सोमवासरः अस्ति। Today is Monday.
- श्वः मङ्गलवासरः भविष्यति। Tomorrow will be Tuesday.
- आकाशः नीलः अस्ति। The sky is blue.
- मम लेखनी रक्ता अस्ति। My pen is red. (लेखनी is feminine, so "red" becomes रक्ता.)
- छात्राः कक्षायां पठन्ति। The students read in the classroom.
The numbers are on the numbers page, and the words for today, tomorrow and yesterday on the avyaya page.