Check if the input is a number
-->{{#ifeq:{{is number|{{{year|{{{1|}}}}}} }}|1 |<!-- YES IT IS A NUMBER: perform as normal (nb: have to include years with digits below 4) -->{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:{{{year|{{{1|}}}}}} works]]}} |<!-- NO IT IS NOT A NUMBER: more if statements and switches to select the right thing. First, add temporary tracking category (unless nocat is true) -->{{#ifeq:{{{nocat|}}}|1||[[Category:Works with non-numeric dates]]}}<!-- Now some checks to determine the type on non-numeric input: -->{{#ifeq:{{{year|{{{1|}}}}}|? |{{#ifeq:{{{noprint|}}}|1|| (unknown) }}{{#ifeq:{{{nocat|}}}|1||[[Category:Works of unknown date]]}} |<!--ELSE check if the input "unknown" -->{{#ifeq:{{{year|{{{1|}}}}}}|unknown |{{#ifeq:{{{noprint|}}}|1|| (unknown) }}{{#ifeq:{{{nocat|}}}|1||[[Category:Works of unknown date]]}} |<!--ELSE check if the input is a decade -->{{#ifeq:{{is decade|{{{year|{{{1|}}}}}}|function=3}}|1 |{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:{{{year|{{{1|}}}}}} works]][[Category:Works of uncertain date]]}} |<!--ELSE check if the input is a century -->{{#ifeq:{{is century|{{{year|{{{1|}}}}}}|function=3}}|1 |{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:{{{year|{{{1|}}}}}} works]][[Category:Works of uncertain date]]}} |<!--ELSE check if the input is Before Common Era (BCE) -->{{#ifeq:{{is year|{{{year|{{{1|}}}}}}|function=3}}|1 |{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:{{{year|{{{1|}}}}}} works]]}} |<!--ELSE check more complicated 2-part inputs -->{{#if:{{#titleparts:{{{year|{{{1|}}}}}}|1|2}}<!-- if there is a 2nd part to the input, separated by a slash -->|{{#switch:{{lc:{{#titleparts:{{{year|{{{1|}}}}}}|1|1}}}}<!-- check the 1st part --> | c | c. | circa = <!-- year entered as "circa/YYYY" -->{{#ifeq:{{Is year | input = {{#titleparts:{{{year|{{{1|}}}}}}|1|2}} | function = 3 }} |1 |{{#ifeq:{{{noprint|}}}|1|| (c. {{#titleparts:{{{year|{{{1|}}}}}}|1|2}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:{{is year|input={{#titleparts:{{{year|{{{1|}}}}}}|1|2}}|function=1}} works]][[Category:Works of uncertain date]]}}<!-- ie. use the corresponding decade-based category for sorting this work with a "circa"-style date --> |<!-- ELSE -->{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:Works with unrecognised dates]][[Category:Undated works]]}}<!-- a "circa"-style date with a non-year 2nd part get categorised as unrecognised and undated --> }}<!-- end ifeq isyear titleparts (2nd part) --> | #default = <!-- ELSE -->{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:Works with unrecognised dates]][[Category:Undated works]]}}<!-- if a multi-part date but no matches, categorise as unrecognised and undated --> }}<!-- end switch titleparts (1st part) --> |<!-- ELSE -->{{#ifeq:{{{noprint|}}}|1|| ({{{year|{{{1|}}}}}}) }}{{#ifeq:{{{nocat|}}}|1||[[Category:Works with unrecognised dates]][[Category:Undated works]]}}<!-- if the input is STILL not recognised, categorise it as unrecognised and undated --> }}<!-- end if titleparts --> }}<!-- end ifeq year BCE --> }}<!-- end ifeq century --> }}<!-- end ifeq decade --> }}<!-- end ifeq "unknown" --> }}<!-- end ifeq ? --> }}<!-- end ifeq isnumber -->
|{{#ifeq:{{{nocat|}}}|1||[[Category:Undated works]]}}
}}<!-- if value in parameter {{{year|{{{1}}}}}} -->