日期：first sunday of april
开始：。
这个节日在各国庆祝 (+1):
俄罗斯.Geologists Day在其他年份
| 开始日期 | |
|---|---|
| Geologists Day 2400 | |
| Geologists Day 2401 | |
| Geologists Day 2402 | |
| Geologists Day 2403 | |
| Geologists Day 2404 | |
| Geologists Day 2405 |
日期：first sunday of april
开始：。
| 开始日期 | |
|---|---|
| Geologists Day 2400 | |
| Geologists Day 2401 | |
| Geologists Day 2402 | |
| Geologists Day 2403 | |
| Geologists Day 2404 | |
| Geologists Day 2405 |