日期：last Sunday of May
开始：。
这个节日在各国庆祝 (+1):
俄罗斯.Chemist's Day在其他年份
| 开始日期 | |
|---|---|
| Chemist's Day 2250 | |
| Chemist's Day 2251 | |
| Chemist's Day 2252 | |
| Chemist's Day 2253 | |
| Chemist's Day 2254 | |
| Chemist's Day 2255 |
日期：last Sunday of May
开始：。
| 开始日期 | |
|---|---|
| Chemist's Day 2250 | |
| Chemist's Day 2251 | |
| Chemist's Day 2252 | |
| Chemist's Day 2253 | |
| Chemist's Day 2254 | |
| Chemist's Day 2255 |