Should I count the first day?

For a legal period such as "within 30 days", Civil and Commercial Code s.193/3 says the first day is not counted. For leave days or hotel nights people usually count both ends — choose "Count the first day".

Can it skip public holidays?

Not yet, because holidays change every year by announcement. The Monday–Friday count therefore includes public holidays that fall on weekdays.

Days Between Dates Calculator

How many days, weeks and weekdays between two dates

Verified + our stated conventionLast verified 28 September 2026

Your numbers

Start date

End date(optional)

Leave empty for today (Thailand time)

Count the first day?

Result

Enter your numbers on the left. The result appears here instantly.Enter your numbers above. The result appears here instantly.

Tested examples

Every example below is an automated test. Click one to try it.

Formula

Days = end − start (plus 1 when counting the first day)
Mondays–Fridays are counted among the days in the range

Assumptions

Public holidays are not removed
Saturday and Sunday are the weekly holidays, as in the Prime Minister's Office notice on government holidays

Sources

สำนักงานคณะกรรมการกฤษฎีกา
ประมวลกฎหมายแพ่งและพาณิชย์ มาตรา 193/3 และมาตรา 193/8
accessed 28 September 2026
สำนักนายกรัฐมนตรี (สำเนาโดยมหาวิทยาลัยขอนแก่น)
ประกาศสำนักนายกรัฐมนตรี เรื่อง กำหนดเวลาทำงานและวันหยุดราชการ (ฉบับที่ 12) พ.ศ. 2502
accessed 28 September 2026

Internal reference: reference/15_days_between.md

FAQ

Age Calculator

Results support decisions. For tax, legal, financial or construction matters, please check with a professional.