1. thíi ທີ່ ່  has several uses in Lao.  Here it is used with cardinal numbers to make ordinal numbers. 

For example,

ໜຶ່ງ	nŷŋ	one
ທີ່ໜຶ່ງ	thíi nȳŋ	the first
ສອງ	sɔ̌ɔŋ	two
ທີ່ສອງ	thíi sɔ̌ɔŋ	the second

2. The traditional Lao calender and the Western calendar do not coincide.  In Lao, ເດືອນຝະຫຼັ່ງ dyan falāŋ   refers to the western calendar.

ເດືອນໜຶ່ງຝະຫຼັ່ງ	dyan nȳŋ falāŋ	January
ເດືອນສອງຝະຫຼັ່ງ	dyan sɔ̌ɔŋ falāŋ	February
ເດືອນສາມຝະຫຼັ່ງ	dyan sāam falāŋ	March

3. wán  ວັນ (day) is usually used only to refer to the days of the week: wán aathīt  ວັນອາທິດ (Sunday).   But sometimes, it refers to another occasion, such as wán kǝ̂ǝt ວັນເກິດ (birthday).
4.    tε̄ε ແຕ່   may be used with the meaning 'only'.

ຂ້ອຍໄປແຕ່ວັນເສົາ

khɔ̂y pay tε̄ε wán sǎw

I go only on Saturdays.

5. Note the word order when one gives a date; day, month, year.  
6. sūan lâay ສົ່ວນຫຼາຍ   has different meanings depending on word order.

ສົ່ວນຫຼາຍຂ້ອຍເບິ່ງແຕ່ກີລາ	sūan lǎay khɔ̂y bǝ̄ŋ tε̄ε kiláa	I mostly watch sports.
ຄົນລາວສົ່ວນຫຼານກິນເຂົ້າໜຽວ	khón láaw sūan lǎay kin khǎw níaw	Most Lao people eat sticky rice.

7. Note that    síp ét ສິບເອັດ    means '11',  hɔ̀ɔy ét ຮ້ອຍເອັດ       means '101', phán ét ພັນເອັດ     means '1,001'.