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 2391 | |
| Geologists Day 2392 | |
| Geologists Day 2393 | |
| Geologists Day 2394 | |
| Geologists Day 2395 | |
| Geologists Day 2396 |
日期：first sunday of april
开始：。
| 开始日期 | |
|---|---|
| Geologists Day 2391 | |
| Geologists Day 2392 | |
| Geologists Day 2393 | |
| Geologists Day 2394 | |
| Geologists Day 2395 | |
| Geologists Day 2396 |