Table:
0
A
B
C
D
E
1
Date
Name
Local Name
2012 Date
2013 Date
2
Date
Name
Local Name
2012 Date
2013 Date
3
January 1 1
New Year's Day
Нова Година, Nova Godina
January 1
January 1
4
January 2 1
New Year's Day
Нова Година, Nova Godina
January 2
January 2
5
January 7
Julian Orthodox Christmas
Божић, Božić
January 7
January 7
6
February 15 1
Serbia National Day
Дан државности Србије, Dan državnosti Srbije
February 15
February 15
7
February 16 1
Serbia National Day
Дан државности Србије, Dan državnosti Srbije
February 16
February 16
8
varies
Orthodox Good Friday
Велики петак, Veliki petak
April 13
May 3
9
varies
Orthodox Easter
Васкрс, Vaskrs
April 15
May 5
10
varies
Orthodox Easter Monday
Васкрсни понедељак, Vaskrsni ponedeljak
April 16
May 6
11
May 1 1
May Day / International Workers' Day
Празник рада, Praznik rada
May 1
May 1
12
May 2 1
May Day / International Workers' Day
Празник рада, Praznik rada
May 2
May 2
13
November 11 1
Armistice Day
Дан примирја, Dan primirja
November 11
November 11

Questions and formulas:
Question: What is the date with the local name, дан државности србије, dan državnosti srbije, and what is February 15, 2012?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="дан државности србије, dan državnosti srbije")*(D1="february 15")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,(C2:C13="дан државности србије, dan državnosti srbije")*(D2:D13="february 15")),1))
Level: medium
Question: What is the local name for January 7, 2013?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="january 7"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,E2:E13="january 7"),3))
Level: medium
Question: What was on January 7, 2012?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="january 7"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,D2:D13="january 7"),1))
Level: medium