We use "สวัสดี" to greeting other people (Like "Good morning, Good evening) but this word can use in anytime of day no matter what time it is. But to use it properly in Thai you have to use it with "Kraab" ( if you're male) or "Kaa" (If you're female)
For male speaker : "สวัสดีครับ" = Saa-Waat-Dee-Kraab
For female speaker : "สวัสดีค่ะ" = Saa-Waat-Dee-Kaa
Sawatdee הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד