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 2411 | |
| Geologists Day 2412 | |
| Geologists Day 2413 | |
| Geologists Day 2414 | |
| Geologists Day 2415 | |
| Geologists Day 2416 |
日期：first sunday of april
开始：。
| 开始日期 | |
|---|---|
| Geologists Day 2411 | |
| Geologists Day 2412 | |
| Geologists Day 2413 | |
| Geologists Day 2414 | |
| Geologists Day 2415 | |
| Geologists Day 2416 |